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![](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(131.20000000000002, 22%, 22%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EE%3C/text%3E%3C/svg%3E)
Hello, we have an on prem and exchange online setup.
The user with the issue has an Exchange Plan 2. 100 Gig mailbox with Autoexpanding Archive enabled.
The primary mailbox has been at 98 Gig for about a week. The retention policy was set to 30 days in an effort to quickly reduce the size of the mailbox.
There has been almost no movement. Start-ManagedFolderAssistant command has been used serveral times over the past 6 days. Why isn't this mailbox not archiving?
Not legal holds on this mailbox.
Please refer to screenshot.
Thank you,
![](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(44.800000000000004, 43%, 14%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EBJ%3C/text%3E%3C/svg%3E)
Hello, @eladmin365
It's been a long time since I've heard from you, have you solved your problem yet? Did my previous reply help you？ If it was useful, you can mark it as an answer. Thank you for your understanding and support.
Hello, @eladmin365
It's been a long time since I've heard from you, have you solved your problem yet? Did my previous reply help you？ If it was useful, you can mark it as an answer. Thank you for your understanding and support.
Well, it does say it can take up to 30 days to start:
https://learn.microsoft.com/en-us/purview/enable-autoexpanding-archiving
Autoexpanding archive is has been enabled for months. Plan 2 archive has a 100 Gigs limit. You can see in the attached screenshot that the archive is at 140 Gigs. That means its been auto expanding for several cycles.
The primary mailbox is at 98 Gigs. There is retention policy set to archive anything over 30 days old. That retention policy should be increaseing the archive size and decreasing the primary mailbox significantly. But it's not doing it.
I have used the Start-ManagedFolderAssistant command several times. No problem there.
Thank you for your response. Please advise.
Hi，@eladmin365
Thanks for posting your question in the Microsoft Q&A forum.
Based on your description, there seems to be a problem with archiving your mailbox.
A review of the official Microsoft documentation shows that the retention policy runs automatically every 7 days for mailboxes larger than 10 MB.
This issue also occurs if the primary mailbox has a disabled associated user account, unless the mailbox is a shared mailbox.
You can refer to this URL for details: Messages aren't moved to archive mailbox after you create retention policy - Microsoft 365 | Microsoft Learn
If my answer is helpful to you, please mark it as the answer so that other users can refer to it. Thank you for your support and understanding.
Hello, @eladmin365
It's been a long time since I've heard from you, have you solved your problem yet? Did my previous reply help you？ If it was useful, you can mark it as an answer. Thank you for your understanding and support.