I am pretty new to the Sysadmin Field, but I wanted to know what solutions are normally used for mailbox backups once a user has been terminated from a company.
I work for an MSP, and we have 3 different setups we use for clients:
- Convert the user to a shared mailbox and unlicense + block user sign-ins, this works fine if the mailbox is less than 50gb but it can clutter up the Admin Portal because you can not delete the user account.
- Backup O365 accounts to a NAS using backup software; we use the Synology M365 tool to make mailbox backups nightly; this seems to work the best for us so far; even if a user is deleted, their mailbox is retained.
- Use eDiscovery to download t



