7,925 questions with Exchange | Exchange Server | Management tags

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1 answer

Update to Exchange Server 2019 CU15 fails with error 1612

I have tried to update to CU15 but it fails when it starts to install Language files language 'am'. From what i read i have to use Volume Licensed version of the CU15 that i dont have. I don't have access to VL and i dont know how was it installed in the…

Exchange | Exchange Server | Management
asked 2025-07-06T19:18:07.2033333+00:00
Aleksandar Maksimovski 1 Reputation point
commented 2025-07-11T07:56:18.43+00:00
Vergil-V 800 Reputation points Microsoft External Staff Moderator
1 answer

Public folders disappearing after some seconds from outlook clients

On exchange 2019 on premise , suddenly without any specific reason , in OWA there are no public folders for users. On outlook clients , when opening client, pulbic folders are visible and data is redable, after aboutn 30 seconds all public folders…

Exchange | Exchange Server | Management
asked 2025-06-02T16:23:30.6033333+00:00
leo fabiani 10 Reputation points
commented 2025-07-11T00:50:38.8766667+00:00
Juan M 0 Reputation points
1 answer

Cannot remove old Exchange server

Hello, my company utilizes a hybrid environment with all mailboxes being Office 365 mailboxes. I am currently unable to access the EAC due to a certificate error stating "mismatched address", and "Error Code:…

Exchange | Exchange Server | Management
asked 2025-07-01T16:47:27.86+00:00
Chris Melnik 5 Reputation points
commented 2025-07-10T08:52:23.8133333+00:00
Vergil-V 800 Reputation points Microsoft External Staff Moderator
6 answers

Add a Service Credential pop-up in Outlook Critical issue

A new Microsoft Credential Pop-Up labeled "Add Service" is preventing users from connecting to our On-Prem exchange server. We have On-Prem Microsoft Exchange 2019, and also have Office 365 licenses for each client machine. The "Add a…

Outlook | Windows | Classic Outlook for Windows | For business
Microsoft 365 and Office | Install, redeem, activate | For business | Windows
Exchange | Exchange Server | Management
Exchange | Other
asked 2024-08-19T15:09:20.2866667+00:00
Carl Cobon 10 Reputation points
answered 2025-07-09T19:55:24.6366667+00:00
Charles Lynskey 75 Reputation points
1 answer

Convert SyncState(EWS) to Delta(Graph)

Hi! We are changing from EWS to Graph to read a mailbox. On EWS we used SyncFolderItems operation, with the SyncState (https://learn.microsoft.com/en-us/exchange/client-developer/web-service-reference/syncfolderitems-operation) On Graph we…

Exchange | Exchange Server | Management
Microsoft Security | Microsoft Graph
asked 2022-09-07T18:40:18.007+00:00
Gabriel Roy 21 Reputation points
answered 2025-07-09T14:53:45.54+00:00
Dan 0 Reputation points
2 answers

How to fix Error Acquiring Token

I'm getting this error whenever i try to connect to Exchange online using PowerShell as Admin and I can't figure out how to fix it. Error Acquiring Token: Unknown Status: Unexpected Error: 0xffffffff80070520 Context: (pii) Tag: 0x21420087 (error code…

Exchange Online
Exchange Online
A Microsoft email and calendaring hosted service.
6,195 questions
Exchange | Exchange Server | Management
Windows for business | Windows Server | User experience | PowerShell
asked 2025-01-13T15:53:39.0066667+00:00
Andrea Thiel 5 Reputation points
commented 2025-07-09T08:33:12.2766667+00:00
Schehed Al Attar 0 Reputation points
2 answers One of the answers was accepted by the question author.

Exchange SE RTM

Hello Microsoft Team i have a question . Microsoft have released on 01.07.2025 Exchange SE RTM . Now i want to know , need we for it "CAL and Server" licencing ? or CAL and Server licencing would be needed for Exchange SE CU1 ? can you help me…

Exchange | Exchange Server | Management
asked 2025-07-03T05:28:06.6466667+00:00
Pooya Mofrad (Admin) 80 Reputation points
commented 2025-07-08T05:54:29.2533333+00:00
Pooya Mofrad (Admin) 80 Reputation points
2 answers

Issues Sending Emails from @netcabo.pt — DKIM Failure Due to Domain Misconfiguration

Hello Microsoft Q & A,     I’m writing on behalf of multiple users affected by a persistent issue impacting legacy email addresses with the @netcabo.pt domain (formerly managed by the Portuguese ISP NOS, now hosted on Microsoft infrastructure).   …

Exchange | Exchange Server | Management
asked 2025-07-01T22:20:05.12+00:00
Jorge C (Fórum NOS) 10 Reputation points
edited an answer 2025-07-07T22:37:53.2733333+00:00
Morpheus Ziplon‏‏‎ 0 Reputation points
1 answer

Decrypt STARTTLS SMTP session

Hi there! I have an application that sends email through my mail server (exchange 2016) using AUTH and TLS. Some times this app does something wrong at smtp session level (in SMTP receive logs I see that SMTP session completes with errors). And the…

Exchange | Exchange Server | Management
asked 2025-07-01T09:02:23.1666667+00:00
commented 2025-07-04T03:51:11.87+00:00
TiNo-T 2,540 Reputation points Microsoft External Staff Moderator
2 answers One of the answers was accepted by the question author.

Unable to uninstall Exchange 2019

Exchange 2019, Server 2019. Exchange server A became corrupted. Filter service won't start so transport, etc. won't start. Exchange server B was created and all mailboxes/functions were moved to B. A was powered off and B functioned as normal. The time…

Exchange | Exchange Server | Management
asked 2025-05-24T14:46:30.5366667+00:00
Susan Dodds 281 Reputation points
edited a comment 2025-07-03T18:10:57.8+00:00
Susan Dodds 281 Reputation points
2 answers

Outlook and Exchange 2019 no Automapping with mail of second domain

Hi dear Experts! we have an Exchange Server 2019 and Outlook (365) on the Client. We use a Domain domain1.de for 90% of our mailboxes and a second domain domain2.de for a few mailboxes. Everything worked fine till a couple of month ago. Now, if i give a…

Exchange | Exchange Server | Management
asked 2025-06-23T14:55:25.6+00:00
Alex-FHD 0 Reputation points
answered 2025-07-03T15:15:46.0033333+00:00
Alex-FHD 0 Reputation points
3 answers

How to fix "This message couldn't be delivered because the sending email address was not recognized as a valid sender" error

When trying to send an email, I receive an error message stating "This message couldn't be delivered because the sending email address was not recognized as a valid sender. The most common reason for this error is that the email address is, or was,…

Outlook | Windows | Classic Outlook for Windows | For business
Exchange | Exchange Server | Management
asked 2024-01-03T06:31:39.76+00:00
Rudraraj Mer 35 Reputation points
commented 2025-07-03T11:16:48.0066667+00:00
Aman Kumar 0 Reputation points
3 answers One of the answers was accepted by the question author.

Errors Uninstalling Exchange 2013 CU23

We have an Exchange on prem estate consisting of Exchange 2013/2016 in coexistence. All mailflow has been moved onto the Exchange 2016 servers, including EOL hybrid. We've confirmed there is no traffic going through Exchange 2013 anymore, and all…

Exchange | Exchange Server | Management
asked 2021-11-05T10:04:20.023+00:00
Andrew Garland 41 Reputation points
edited a comment 2025-07-01T06:21:20.69+00:00
Matt U 0 Reputation points
1 answer One of the answers was accepted by the question author.

In-Place Archiving - Read Only Access in Exchange Server 2016

When an In-Place Archive is created for User A, the requirement is for User A to have only Read Only access to their own In-Place Archive. What are the steps to configure In-Place Archiving - Read Only Access for this scenario?

Exchange | Exchange Server | Management
asked 2025-06-26T10:37:56.4666667+00:00
Salim Hurjuk 21 Reputation points
accepted 2025-06-30T08:17:13.66+00:00
Salim Hurjuk 21 Reputation points
1 answer

Cannot send email with Exchange account in Mac Mail. Error says "From address is not one of your addresses" - but it is one of my addresses.

It's been days since I posted a query, and there is NO WAY TO GET TECH HELP on the phone, so this is my only option with MS. I set up my hotmail as an Exchange account on the MacBook Pro. It's enabled and green, and can receive emails, but cannot send.…

Exchange | Exchange Server | Management
asked 2025-06-24T18:59:48.9866667+00:00
Jason Kaufman 0 Reputation points
commented 2025-06-30T01:31:13.26+00:00
TiNo-T 2,540 Reputation points Microsoft External Staff Moderator
2 answers

Recent Exchange Calendar Sync Issues with iOS Devices, Exchange 2019 & 9646 Errors

Title: Exchange Calendar Sync Failures for some users with ExchangeIS 9646 App Log Errors Details: We have ~ten or so users that have reported calendar sync issues using Exchange On-Prem, iOS Native Calendar and our MDM (Ivanti MobileIron) over the past…

Exchange | Exchange Server | Management
asked 2025-03-15T20:52:25.56+00:00
KM_MB 0 Reputation points
commented 2025-06-27T06:33:04.4166667+00:00
TK 0 Reputation points
3 answers

"HTTP Error 503. The service is unavailable" then browsing to /ECP "exchange 2019"

Hi Migrating from exchange 2016 to 2019. Exchange host 2019: elemsex01 I get "HTTP Error 503. The service is unavailable" when browsing to: Hostname correct certificate: https://elemsex01.corp.elevation.se/ecp/ Local host:…

Exchange | Exchange Server | Management
asked 2020-11-06T11:44:30.603+00:00
Martin Skorvald 26 Reputation points
commented 2025-06-26T22:06:44.42+00:00
TechBuddy 0 Reputation points
1 answer

Exchange activesync issue with specific user

We have face a weird situation, one of the company user face Exchange activesync issue. PC Outlook: No problem and smooth connection iOS and iPad OS device: mail delay, sometime even it cannot sync when new item arrives. But device notification does show…

Exchange | Exchange Server | Management
asked 2025-06-25T01:04:21.4033333+00:00
Tang, Ken 65 Reputation points
commented 2025-06-26T05:27:22.4166667+00:00
Jade-T 2,220 Reputation points Microsoft External Staff Moderator
2 answers

Unable to Send/Receive Internal External Email

HI Hopefully someone can help with this. We have exchange server 2019 CU 15, when sending email through OWA it sits in drafts. If we use outlook, it goes to sent but is never sent through the exchange server. Both for internal or external recipients. We…

Exchange | Exchange Server | Management
asked 2025-06-18T13:09:26.2766667+00:00
Craig Vazquez 0 Reputation points
answered 2025-06-25T14:58:41.1233333+00:00
Craig Vazquez 0 Reputation points
5 answers One of the answers was accepted by the question author.

Server Login

I am having some issues with a server 2019 hosting exchange server 2019. The issue is logging into the 2019 server and should have nothing to do with the exchanges themselves since we can still manage them using ECP, and they seem to be working fine. I…

Exchange | Exchange Server | Management
Windows for business | Windows Server | User experience | Other
asked 2022-03-15T18:22:19.053+00:00
Johnnie Pippin 21 Reputation points
commented 2025-06-23T12:40:36.8266667+00:00
Himanshu Kumar 0 Reputation points