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CraigPauley's avatar
CraigPauley
Copper Contributor
Aug 07, 2025
Solved

Reducing mailbox size

I'm using outlook with Office 365 and I'm  getting close to my mailbox limit. Currently I have over 68k emails, some dating bask to 2012 in my main box which is over 90% of my storage capacity.

I don't want to mass delete emails, but happy to 'remove' emails prior to 2025 form my daily inbox and even move them to file storage.

Whats my best options here as I believe just using the archive box doesn't reduce my mail box size and just copying them to a folder in SharePoint but I don't have a way to sort them in to the the date of when the email was received/sent.

  • Best practice by Microsoft is get an expanded mailbox, the Exchange Plan 2 and then the overflow from Outlook stays in the cloud and is searchable in Outlook. 

    You could move the older emails to a PST but I would not store them in SharePoint if you are going to keep them in Outlook. They can get corrupted if stored in a synchronizing platform. I would store on the C: Drive and backup manually to external. 

     

     

1 Reply

  • Best practice by Microsoft is get an expanded mailbox, the Exchange Plan 2 and then the overflow from Outlook stays in the cloud and is searchable in Outlook. 

    You could move the older emails to a PST but I would not store them in SharePoint if you are going to keep them in Outlook. They can get corrupted if stored in a synchronizing platform. I would store on the C: Drive and backup manually to external. 

     

     

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