588 questions with Exchange | Exchange Server | Development tags
Got an error (500) "The attachment could not be opened" when downloading attachments from Calendar
We got an error "The attachment could not be opened" (status code= 500) when downloading some events' attachments. We developed a script to download all events' attachments through graph api. Here's what we did: Use…
Exchange Online
Exchange | Exchange Server | Development
Microsoft Security | Microsoft Graph
oAuth2 Outlook Office365 & Pop3 - Client Credential Grant Flow
Ive gone through all the documentation i can find (this one is fantastic https://www.youtube.com/watch?v=bMYA-146dmM&t=609s) But for the life of me I cannot get POP3 to work. IMAP etc works fine. But its just plain not authenticating, I'm…
Microsoft 365 and Office | Office Online Server

Exchange | Exchange Server | Development
Exchange Installation, please help me
Hi! I have an AD domain xxx.com and the AD subdomain m1.xxx.com . I'm going to install an Exchange 2019 server in a domain M1.xxx.com . To carry out the preparatory actions, I created an account in the domain xxx.com ACC1 and included it in the AD…
Exchange | Exchange Server | Other
Exchange | Exchange Server | Development
Exchange | Exchange Server | Management


unable to receive more than 35 MB from outside organization in exchange server in hybrid environment
I have set maximum send size is 35 MB and receive size is 45 MB. but when i send email from outside/ ExchangeOnline around 30MB so give me below error that limit is 35 MB, Although i have set 45 MB in receive connector and transport as well. please…
Exchange | Exchange Server | Other
Exchange | Exchange Server | Development
Exchange | Exchange Server | Management
Exchange | Hybrid management
Exchange | Other
Unable to License the Hybrid Exchange server
I have 3 Exchange servers (Enterprise licensed) in the environment. Now I have installed the 4th Exchange server for Hybrid management purpose. When I run the HCW to license the 4th server with Hybrid License, the HCW is showing a different server in the…
Exchange Online
Exchange | Exchange Server | Other
Exchange | Exchange Server | Development
Exchange | Exchange Server | Management
Exchange | Hybrid management
How to implement EWS API for connecting Outlook on-premise user's calendar data
Our website(which is built on Rails framework) has Outlook calendar integration through which our client's user can connect their Outlook calendar & then we fetch or push events to their Outlook calendar, Currently, we are using this API for…
Exchange | Exchange Server | Other
Exchange | Exchange Server | Development
Microsoft Security | Microsoft Graph
Accessing In-Reply-To and References Headers via Microsoft.Office.Interop.Outlook
Dear Microsoft Support Team, I hope this message finds you well. I am working on a project that involves accessing specific email headers, specifically In-Reply-To and References, from .msg files using the Microsoft.Office.Interop.Outlook library.…
Microsoft 365 and Office | Development | Other

Outlook | Windows | Classic Outlook for Windows | For business
Exchange | Exchange Server | Development

Is "Storage Used(bytes)" in reportRoot: getMailboxUsageDetail grpah api report consists of archive mailbox size as well?
Hello, Is "Storage Used(bytes)" in reportRoot: getMailboxUsageDetail graph api report consists of archive mailbox size as well? Similarly, is "Deleted Item Size (Byte)" from getMailboxUsageDetail graph api report consists of…
Exchange | Exchange Server | Development
Microsoft Security | Microsoft Graph

Understand about Permission EWS.AccessAsUser.All
Hi, Current I using EWS to get free and busy for users in my org. But when I using lib https://ecederstrand.github.io/exchangelib need require oauth2 using permission EWS.AccessAsUser.All like…
Exchange Online
Exchange | Exchange Server | Development
Exchange | Exchange Server | Management
Microsoft Security | Microsoft Graph
Request for MAPI Property Tags for In-Reply-To and References Headers
Dear Microsoft Support Team, I hope this message finds you well. I am currently working on a project that requires accessing specific email headers, namely In-Reply-To and References, from .msg files using the Microsoft.Office.Interop.Outlook library. I…
Exchange Online
Microsoft 365 and Office | Development | Other

Outlook | Windows | Classic Outlook for Windows | For business
Exchange | Exchange Server | Development
Send Email via 365 Mail using PHP mailer Function
i have tried to send mail via 365 office mail using php mailer function but its getting fialed, use follwing code, <?php require 'vendor/phpmailer/phpmailer/PHPMailerAutoload.php'; $mail = new PHPMailer(true); $mail->isSMTP(); $mail->Host =…
Exchange Online
Microsoft 365 and Office | Install, redeem, activate | For business | Windows
Exchange | Exchange Server | Development
Query on web services
Hi all, I am using an Exchange 2016 hybrid environment. I had a script that was working fine with Exchange 2010. After upgrading to Exchange 2016, the script stopped working. I have a member server on which I installed the Exchange 2016 management tools.…
Exchange Online
Exchange | Exchange Server | Development
Exchange | Exchange Server | Management
Exchange | Hybrid management
OutlookOffice365 IMAP :how to get access token(API) using username and App password when MFA is enabled?
Hi Team, As you all aware that MS Office 365 changed from Basic Auth to Modern Authentication recently, so it blocks all access from protocols such as IMAP/POP/SMTP. In that case we have to use Access token (OAUTH 2.0) generated from MS API by…
Exchange Online
Outlook | Windows | Classic Outlook for Windows | For business
Exchange | Exchange Server | Development
DAG File share witness issue in multiple DAG environment for Exchange server
Hello expertise, I have an Exchange Server environment with Exchange Server 2016, consisting of two mailbox servers in the DC site and two in the DR site, configured in a DAG named "dag01." Currently, I am migrating to Exchange Server 2019.…
Exchange | Exchange Server | Other
Exchange | Exchange Server | Development
Exchange | Exchange Server | Management
Exchange | Other

OoO - DistributionGroup Setup
Background: I’ve been exploring how to set up a distribution group in Exchange to receive Out-of-Office (OoO) messages from its members. …
Outlook | Windows | Classic Outlook for Windows | For business
Exchange | Exchange Server | Development
Exchange | Exchange Server | Management


Getting an error when trying to setup Exchange Online ForwardingAddress in Azure Runbook
Hello, I am trying to setup an Azure Automation Runbook in which I convert a User Mailbox to a Shared Mailbox and setup a ForwardingAddress. I setup all the permissions and converting the mailbox is working, setting a forwarding address throws the…
Azure Automation
Exchange | Exchange Server | Development
Windows for business | Windows Server | User experience | PowerShell
How to disable NTLMv1 for Exchange 2016.
Hello, We are disabling NTLMv1 and enabling only NTLMv2 in our environment. We have already configured the LAN Manager Authentication Level setting on our Exchange Server 2016 server to 'Send NTLMv2 response only\refuse LM & NTLM'. However, do we…
Exchange | Exchange Server | Other
Exchange | Exchange Server | Development
Exchange | Exchange Server | Management
Exchange | Hybrid management
Exchange | Other
Exchange Server DR-Drill activity
Hi Expertise, I have an Exchange mail setup in both DC (DCMBX01, DCMBX02) and DR (DRMBX03, DRMBX04) environments. Here, I have a Database Availability Group (DAG) configured with different witness servers for DC and DR. I want to perform a DR Drill…
Exchange | Exchange Server | Other
Exchange | Exchange Server | Development
Exchange | Exchange Server | Management
Exchange | Hybrid management

error not display database on ecp exchange 2016
Our system has 2 faulty Exchange servers. I have removed these 2 servers from AD and reinstalled Exchange 2016 on 2 other servers. After installation is complete, we proceed to create a DB for the system. When creating, there is an error message Multiple…
Exchange | Exchange Server | Other
Windows for business | Windows Client for IT Pros | Directory services | Active Directory
Exchange | Exchange Server | Development
Exchange | Exchange Server | Management
Exchange | Other
Out of office doesn't work for external users.
Out of office doesn't work for external users in On-Premises Exchange 2016. I have set RemoteDomain $true. Configured auto reply for a user from exchange managment shell, OWA and outlook. verified the configuration but no luck in auto reply for external…