Distribution Groups vs Shared Mailboxes for 3rd-part Admin accounts

Posted by KM_Sys_Adm@reddit | sysadmin | View on Reddit | 4 comments

Just interested to see what other admins think...

What are the pros and cons of using a M365 Distribution Group vs a M365 Shared Mailbox when creating vendor or 3rd-party admin accounts.

I've seen a lot of Distribution Groups used for accounts where historical records are required. MFA backup emails, notification accounts, etc.
I lean towards Shared Mailboxes, but I'm guessing in the next 3-5 years, Microsoft will start requiring licensing for them. Shared Mailboxes are taking a ton of storage on Microsoft's side. The time of the free archival storage is limited in my opinion.