Hi @ByDesign1977
I'm sure there is a better way to do it but this is the best my brain can come up with at the moment:
two steps - first connect to powershell and get a list of shared mailboxes and pump them to get-msol user so you get the UserPrincipalName, and pump this to a txt file.
Get-Mailbox -Filter {recipienttypedetails -eq "SharedMailbox"} | get-MsolUser | ft userprincipalname > c:\support\sharedmailboxes.txt
Tidy up the text file - remove the header and make sure each UPN is on it's own line with no spaces. Then run the below to disable the accounts, referencing the amended txt file
Get-Content "C:\support\sharedmailboxes_disable.txt" | ForEach { Set-MsolUser -UserPrincipalName $_ -BlockCredential $true }
This will run through the list you have disable. Change the flag to $true if you want to enable them en-masse again.
Confirm this has worked with
Get-Mailbox -Filter {recipienttypedetails -eq "SharedMailbox"} | get-MsolUser | ft userprincipalname,blockcredential
Like I said I'm sure that there is a more elegant one-liner out there, but I'm not brilliant at Powershell.
Hope this helps,
Mark
