During the last months I came across an influx of full mailboxes. In most cases were used to relay messages from other platforms. One of those has exceeded our Organization default quota by 102% and of course the rest were at 97% to 99% of the current quota.
My first though was to change the Retention policy down to a month with the users approval and start the Managed Folder Assistant which unfortunately did not solve the issue. You can find more on that on Sam’s IT Blog.
When working with Exchange online Powershell there are several things to keep in mind:
- You can have up to 3 Sessions at the same time
- Exchange Online sessions do have restricted language mode enabled and you can find a way to solve the variable issue on michev.info
- There is a Powershell Throttle , please refer to this post on how to calculate your micro delays .