2,060 questions
2,060 questions with Windows for business | Windows Server | Devices and deployment | Set up, install, or upgrade tags
1 answer
Couldnot upgrade Windows Server 2016 to 2022
Hi Team, I've performed upgrading the Windows server from 2016 to 2022, but I get the issue below. Could you please assit me this issue?
Windows for business | Windows Server | Devices and deployment | Set up, install, or upgrade
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(256, 12%, 34%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EDT%3C/text%3E%3C/svg%3E)
2 answers
Upgrading Windows Server 2008 R2 to Windows Server 2025
Hello, I need to upgrade my Windows Server 2008 R2 to Windows Server 2025. I have a few questions: Is a direct upgrade from Windows Server 2008 R2 to Windows Server 2025 supported? Are there any important considerations before upgrading? Will the…
Windows for business | Windows Server | Devices and deployment | Set up, install, or upgrade
asked 2026-07-01T03:38:55.5733333+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(124.80000000000001, 2%, 22%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ETN%3C/text%3E%3C/svg%3E)
Thiên Đố
0
Reputation points
answered 2026-07-13T12:26:29.88+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(9.6, 28.000000000000004%, 10%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EU%3C/text%3E%3C/svg%3E)
USTradeSupplies
0
Reputation points
2 answers
One of the answers was accepted by the question author.
Windows Server 2025 Upgrade option does not appear
My Azure VM is running Window Server 2022 Datacenter Azure Edition (ServerTurbine). I want to in-place upgrade it to Windows Server 2025 and remain my settings, application etc. I have configure the registry setting AllowWindowsServer2025Upgrade and…
Windows for business | Windows Server | Devices and deployment | Set up, install, or upgrade
asked 2026-07-06T10:15:20.2433333+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(211.20000000000002, 47%, 30%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ER5%3C/text%3E%3C/svg%3E)
RichardVogels-5435
20
Reputation points
accepted 2026-07-06T14:04:25.3133333+00:00
RichardVogels-5435
20
Reputation points
1 answer
Migrate Azure resources from one tenant to another tenant
Hi Team, I am looking for some guidance to know the best approach to migration Azure VM and other resources from one tenant to another tenant (we can consider a situation where company has been acquired or getting separated), what are the possible…
Azure Migrate
Azure Migrate
A central hub of Azure cloud migration services and tools to discover, assess, and migrate workloads to the cloud.
1,111 questions
SQL Server Migration Assistant
SQL Server Migration Assistant
A Microsoft tool designed to automate database migration to SQL Server from Access, DB2, MySQL, Oracle, and SAP ASE.
607 questions
Windows for business | Windows Server | Devices and deployment | Set up, install, or upgrade
asked 2023-10-20T11:50:56.3766667+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(19.2, 80%, 11%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EGG%3C/text%3E%3C/svg%3E)
Gautam Gulati
50
Reputation points
commented 2026-07-05T08:25:13.88+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(294.40000000000003, 2%, 38%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ENG%3C/text%3E%3C/svg%3E)
NITIN GUPTA
1
Reputation point
2 answers
Windows Installer not working on Server 2025 Std
New Hyper-V install. Virtual DC built and promoted to DC of new domain. Unable to install or uninstall any applications. Application installs open and sit for around 10 minutes with zero progress on the status bar. Then get the error window…
Windows for business | Windows Server | Devices and deployment | Set up, install, or upgrade
asked 2026-01-19T02:25:52.4933333+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(166.4, 39%, 26%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ETH%3C/text%3E%3C/svg%3E)
Tony Horner
30
Reputation points
commented 2026-07-03T16:04:57.9133333+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(220.8, 51%, 31%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EBA%3C/text%3E%3C/svg%3E)
Best Auto Admin
0
Reputation points
3 answers
Windows Security app is missing from Windows Server 2025 Standard installation
I downloaded Windows Server 2025 Eval to test it out prior to making the commitment to convert my 2016 Essentials server ahead of the January 2027 deadline. I performed a clean-install and tested it out - everything I wanted to do worked fine, so I…
Windows for business | Windows Server | Devices and deployment | Set up, install, or upgrade
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(73.60000000000001, 48%, 17%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EO%3C/text%3E%3C/svg%3E)
1 answer
Upgrade Windows server version to 2019 on a VM buit with image (WS 2012 R2 datacenter)
Hi, title say pretty much all, still I cannot find a reliable source (Copilot can't help). Of course I would prefer to update in place since there's a lot of software & undocumented configuration here. As you probably guessed already, this is a…
Windows for business | Windows Server | Devices and deployment | Set up, install, or upgrade
asked 2026-06-27T17:33:51.9233333+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(118.4, 59%, 21%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EAB%3C/text%3E%3C/svg%3E)
Antoine BAPST
0
Reputation points
commented 2026-06-29T10:53:13.92+00:00
Antoine BAPST
0
Reputation points
3 answers
2026-06 Cumulative Update for Windows Server 2019 (1809) for x64-based Systems (KB5094123) - Error 0x80070057
Azure sync ahent not installing , the updates on windows 2019 server is failing with (2026-06 Cumulative Update for Windows Server 2019 (1809) for x64-based Systems (KB5094123) - Error 0x80070057). Tried DISM or /scannow or everything but unable to…
Windows for business | Windows Server | Devices and deployment | Set up, install, or upgrade
asked 2026-06-27T16:10:58.6633333+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(25.6, 3%, 12%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ERK%3C/text%3E%3C/svg%3E)
Rajan Kumar Singh
0
Reputation points
edited the question 2026-06-29T01:01:09.6933333+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(160, 69%, 25%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ERG%3C/text%3E%3C/svg%3E)
RakeshReddy Gurram
5
Reputation points Microsoft External Staff
Moderator
2 answers
Still having install issues with KB5087539 on Windows Server 2025
So to be clear, I install Windows Server 2025 from a DVD, not an ISO from the Internet. I can't imagine that makes a difference, but there it is. `I have been trying to update several Dell servers that are a few years old, but still supported. Server…
Windows for business | Windows Server | Devices and deployment | Set up, install, or upgrade
asked 2026-05-14T07:08:37.0933333+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(38.4, 59%, 13%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EB%3C/text%3E%3C/svg%3E)
BrianO
0
Reputation points
commented 2026-06-25T22:58:14.44+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(278.4, 3%, 36%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EAH%3C/text%3E%3C/svg%3E)
Andy Herron
0
Reputation points
2 answers
Upgrade Windows Server 2012 Essentials to Windows Server 2022
Hello all, I am trying to upgrade a server for work from Windows Server 2012 Essentials to Windows Server 2022 Datacenter without losing all of our data. I already have a license key for Server 2022 Datacenter. How would I be able to migrate all the data…
Windows for business | Windows Server | Devices and deployment | Set up, install, or upgrade
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(275.2, 30%, 36%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ET%3C/text%3E%3C/svg%3E)
1 answer
Information requests
What year was Active Directory released by microsoft and was it part of the mcse nt4.0 certification
Windows for business | Windows Server | Devices and deployment | Set up, install, or upgrade
asked 2026-06-23T20:08:22.4166667+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(166.4, 80%, 26%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EHO%3C/text%3E%3C/svg%3E)
hakeem olanrewaju
0
Reputation points
answered 2026-06-23T20:24:03.6033333+00:00
Meerali Naseet
0
Reputation points MVP
1 answer
2 versions of 2026-06 Cumulative Update for Windows Server 2016 for x64-based Systems (KB5094122)
I have 5 different SCCM environments and all are behaving the same . June deployment deployed on 12th to all environments without issue. Delayed deployment sent to DCs on 22. All 2016 DCs reporting compliant but only downloaded and installed SS…
Windows for business | Windows Server | Devices and deployment | Set up, install, or upgrade
asked 2026-06-23T15:36:01.89+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(294.40000000000003, 19%, 38%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EOC%3C/text%3E%3C/svg%3E)
O'Connell. Claire (Contractor - Tomorrows World)
0
Reputation points
answered 2026-06-23T16:16:45.61+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(275.2, 16%, 36%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EV%3C/text%3E%3C/svg%3E)
VPHAN
39,890
Reputation points
Independent Advisor
1 answer
Issues new secured deployment:
We are deploying new servers for our On-Premise Dynamics CRM Customer engagement platform. In this new deployment we are following the security considerations regarding minimally privileged CRM services domain accounts. Security considerations for…
Windows for business | Windows Server | Devices and deployment | Set up, install, or upgrade
asked 2026-06-22T15:15:43.0266667+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(179.20000000000002, 78%, 27%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EEA%3C/text%3E%3C/svg%3E)
Eduardo Acosta
0
Reputation points
commented 2026-06-23T09:06:00.8666667+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(64, 81%, 16%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ECT%3C/text%3E%3C/svg%3E)
Chen Tran
11,785
Reputation points
Independent Advisor
2 answers
In Place upgrade from Windows Server 2019 to 2025
Any suggestions for doing an inplace upgrade of a Virtual Server from Server 2019 to 2025? Windows upgrade is not seeing the update.
Windows for business | Windows Server | Devices and deployment | Set up, install, or upgrade
asked 2026-06-21T14:34:56.96+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(182.40000000000003, 41%, 27%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EPP%3C/text%3E%3C/svg%3E)
Paul Peterson
0
Reputation points
edited an answer 2026-06-23T06:15:52.29+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(310.4, 86%, 40%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ESC%3C/text%3E%3C/svg%3E)
Stephen corald
0
Reputation points
2 answers
One of the answers was accepted by the question author.
I think i managed to delete windows re
So long story shot, I think I maaged to delete windows re when I were trying to transfer windows to andother ssd. When I try to reboot my conputer it just says "Could not find the Recovery Environment" And when I try to go on the cmd to do…
Windows for business | Windows Server | Devices and deployment | Set up, install, or upgrade
asked 2021-04-07T21:27:55.677+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(57.599999999999994, 81%, 15%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ESB%3C/text%3E%3C/svg%3E)
Sebastian Bardoff
21
Reputation points
accepted 2026-06-18T20:55:27.3933333+00:00
Sebastian Bardoff
21
Reputation points
1 answer
One of the answers was accepted by the question author.
Supportability Query: In-Place OS Upgrade of ASR Configuration Server from Windows Server 2016 to 2019
Supportability Query: In-Place OS Upgrade of ASR Configuration Server from Windows Server 2016 to 2019 Dear Microsoft Support Team, I am writing to seek clarification on the supportability of performing an in-place operating system upgrade on an Azure…
Windows for business | Windows Server | Devices and deployment | Set up, install, or upgrade
asked 2026-05-26T05:54:07.76+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(80, 40%, 17%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ERN%3C/text%3E%3C/svg%3E)
Ronak Naresh Joshi
20
Reputation points
commented 2026-06-17T04:15:59.6266667+00:00
Ronak Naresh Joshi
20
Reputation points
2 answers
Upgrade Active Directory Windows Server 2016 to Windows Server 2022
Hello Team! We are planning to upgrade Active Directory Windows Server 2016 to 2022. I am looking for more information and steps to perform this inplace upgrade. I am looking for more details like detailed steps and dependencies like databases upgrade…
Windows for business | Windows Server | Devices and deployment | Set up, install, or upgrade
asked 2026-06-16T14:59:23.6066667+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(211.20000000000002, 39%, 30%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ERK%3C/text%3E%3C/svg%3E)
Ravi Kiran Moole
120
Reputation points
commented 2026-06-16T16:13:53.2+00:00
Ravi Kiran Moole
120
Reputation points
2 answers
One of the answers was accepted by the question author.
Please explain the impact of updating Windows Server 2016 Datacenter.
*This is a translation using Google Translate. Apologies if the English is difficult to read. We are a vendor that maintains and operates business applications using IIS and .NET Framework on Windows Server 2016 Datacenter. With the end of extended…
Windows for business | Windows Server | Devices and deployment | Set up, install, or upgrade
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(28.799999999999997, 82%, 12%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3E7%3C/text%3E%3C/svg%3E)
2 answers
Issues with remoteaccess feature - SSTP VPN
I have setup remoteaccess feature and setup a self-signed SSL certificate VPN. I have been battling with it would only allow 1 connection. All other connection attempts would get a "no response from server error". When the 1st connection…
Windows for business | Windows Server | Devices and deployment | Set up, install, or upgrade
asked 2026-06-10T17:14:06.1166667+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(108.80000000000001, 46%, 20%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ERM%3C/text%3E%3C/svg%3E)
Rick Molnar
0
Reputation points
commented 2026-06-11T20:05:04.9933333+00:00
Rick Molnar
0
Reputation points
2 answers
After Upgrading the server to windows 2025 from 2016 it is rolling back to previous version with the below error code
Windows for business | Windows Server | Devices and deployment | Set up, install, or upgrade
asked 2026-06-08T05:05:07.9033333+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(300.8, 18%, 39%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EHL%3C/text%3E%3C/svg%3E)
Harshavardhan, Lellaboina
0
Reputation points
answered 2026-06-08T06:05:20.38+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(12.8, 62%, 11%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EH%3C/text%3E%3C/svg%3E)
HLBui
9,490
Reputation points
Independent Advisor