Forum Discussion
SharePoint Online Storage Quota Warning reverting to old setting
The storage quota warning for my top level site "companyname.sharepoint.com" reverts back to an old Storage Quota warning setting with no rhyme or reason. The backstory is that when we initially ...
Hi, not come across this myself, but a quick Google found this which matches your issue - https://www.reddit.com/r/sharepoint/comments/iyb5it/sharepoint_site_collection_storage_keeps_resetting/
The only potential solution mentioned within is to reset the quota using the SharePoint Classic Admin experience.
Definitely sounds like a bug though, and you need to keep chasing Microsoft if the Classic admin option doesn't work for you.