have new outlook installation use existing ost file
Hi, I'm running Outlook standalone (installed from Office 365) and have an OST file. My computer crashed completely - won't boot - but luckily I have regular backups. Got new computer, installed Outlook. I want to just point Outlook at the existing…
Microsoft Exchange Online
Outlook
Outlook Management
Why are my clients recieving a verification request when booking a meeting with me, and can it be turned off?
I have been informed by some clients of an issue when using the book with me link. They are booking a meeting slot, then being told to verify email. When doing this on a phone, they are having to leave the booking to verify, then return to the booking…
Microsoft Exchange Online
Prevent user from creating distribution group
Hi all, In my tenant, a normal user can login to exchange admin center https://admin.exchange.microsoft.com/#/groups and create distribution list as below How to prevent this ?
Microsoft Exchange Online
O365 Encrypted Email - How can I tell which outgoing emails were encrypted?
There used to be an Encryption Report, though the results were usually 24 hours behind, where I could look up emails that were flagged for sensitive info and determine if the user encrypted them or not. That report appears to no longer exist. Is there…
Microsoft Exchange Online

Why Remove-MailboxFolderPermission fails if user specified in User property doesn't have any mailbox?
ExoModuleVersion: 3.2.0 Problem: Remove-MailboxFolderPermission cannot remove permission if the user specified in User property doesn't have any Exchange Online mailbox. The cmdlet fails with the following error:…
Microsoft Exchange Online
PowerShell
show the alias instead of the primary email address
When creating a new (shared) mailbox for Office 365 using the primary email address, you can also choose to add multiple alias email addresses. When sending an email to one of these alias addresses, the recipient will always see the primary email address…
Microsoft Exchange Online
Microsoft Exchange Online Management
Possible reasons why a single user is not receiving emails from a distribution group
One user is experiencing an issue where the distribution group is expanding to all members except them. What could be the potential reasons for this problem?
Microsoft Exchange Online
Microsoft Exchange Online Management
Output of PowerShell command is truncated
Hi, I am trying to view the settings of a distribution group using powershell, however the results are truncated. I ran the below command: get-distributiongroup -identity < > | format-list or get-distributiongroup -identity < > |…
Microsoft Exchange Online
Microsoft Exchange
PowerShell
NEW OUTLOOK "Group into conversations" not working for Shared Mailbox
Hi everyone, Can someone advise if in the version: "Microsoft Outlook Version 1.2023.516.100 (Production)" we can set the view in Shared Mailboxes to "Group into conversations". It is showing that it is enabled but not working. What…
Microsoft Exchange Online
Outlook
Outlook Management
Deferred mail with error 451 4.7.500 Server busy when sending mail to domains hosted Microsoft office 365
Dear Community. My company's mail server has an issue when sending emails to domains hosted on Microsoft 365. I use postfix as the smtp mail server engine. In the queue log, log like this: 288A2628411A 656263 Wed Oct 11 14:13:56…
Microsoft 365
Microsoft Exchange Online
How to check all emails sent, recieved or created in the past
In my office we`re currently using "Microsoft 365 apps for business(version 2306)". As I wrote in the title, we are looking for a way to look through emails sent, received or created in the past. If possible we want to check the deleted emails…
Microsoft Exchange Online
How can I block a mass number of senders within Outlook Exchange?
I have an end user receiving massive amounts of spam messages from many addresses. In fact, they have over 4000 senders sending over 17000 messages. I need to block the sending addresses in in large quantities. Is there a way for me to upload a csv file…
Microsoft Exchange Online
Microsoft Exchange Online Management
PowerShell
Dynamic Distribution List member's name showing as Object ID after refresh or exit
I have created one DDL in Exchange online. One member added as a member. After closing and opening again my member username showing as alpha numeric values like GUID or object ID.
Microsoft Exchange Online
Microsoft Exchange Online Management


Public Folder Migration - Exchange 2013 > Office 365 - Stuck at 95% - MailEnabling Public Error
Hello I am trying to migrate our public folder to Office365 following this guide: [https://learn.microsoft.com/en-us/exchange/collaboration/public-folders/migrate-to-exchange-online?view=exchserver-2019 Everything runs through fine, there are no errors…
Microsoft Exchange Online
Exchange Server
Microsoft Exchange Online Management
Exchange Server Management
Microsoft Exchange Hybrid Management
M365 F3 licensed users still showing to have Online Archive
Hi, We have moved some users from E1 to F3 (M365 F3). As per Microsoft site, it states Online Archive is not available for F3. However for users who got F3 still has access to Online Archive and have necessary quota (50GB) which was earlier there. Will…
Microsoft Exchange Online
Need information on Microsoft Message Trace GCC Support to request OAuth Token
I'm exploring MessageTrace report API: https://reports.office365.com/ecp/reportingwebservice/reporting.svc/MessageTrace, I can see that, to generate OAuth Token I need to make a GET call to: https://login.windows.net/<tenant-id>/oauth2/token . Does…
Microsoft 365
Microsoft Exchange Online
Office Development
Microsoft Exchange Online Management
Exchange Server Development
We want to go cloud only with Exchange online, but documentation suggests that we must have an Exchange server on-premises since we have EntraID connect for directory synchronization. Is this true?
We have Microsoft Exchange online in a hybrid configuration with one single Exchange 2016 server. I noticed that Exchange 2016 and 2019 are EOL in October 14 of this year, which means that we may need to migrate to Exchange Server SE on premises to keep…
Microsoft Exchange Online
Exchange Server
Microsoft Exchange Hybrid Management
Microsoft Entra ID
add members in bulk to Mail enabled security group
Hi all, Is there a way to add bulk users into a mail enabled security group and if so does any one have some guidance on this Thanks
Microsoft 365
Microsoft Exchange Online
Microsoft Exchange Online Management
query on onedrive
Hi All, I have a user, ******@contoso.com, and I need to determine how many users currently have access to user1's OneDrive. If user1 has shared any files or folders with other users, I want to revoke all their access. Please guide me how to achieve…
Microsoft Exchange Online
OneDrive
SharePoint
Microsoft Exchange Online Management
OneDrive Management
Can't remove Distribution group
Why I get: Resource '' does not exist or one of its queried reference-property objects are not present. DualWrite (Graph) RequestId: 692cd25a-bfdc-4511-b01c-249e5d28d547 And how to solve?