The Get-365UserAccess.ps1 script simply iterates over all Distribution Groups and Mailboxes in an O365 tenant and prints out all the items that the target user will have access to. With larger tenants this can take a few minutes to fully complete

• The Exchange Online PowerShell module installed on the computer running the script

• 365 login credentials of a Global Admin account

. 'c:\example\exo_user_audit\Get-365UserAccess.ps1' -TargetEmailAddress <user email address> [-AdminEmailAddress <admin email address>]

Where:

• <user email address> is the UserPrincipalName (primary O365 email address) of the user you are auditing
• <admin email address> is an optional email address of the admin account you'd like to connect to the tenant as

PS C:\example\exo_user_audit> . 'c:\example\exo_user_audit\Get-365UserAccess.ps1' -TargetEmailAddress [email protected] -AdminEmailAddress [email protected]
Distribution Groups for '[email protected]':
================================
Fake DL 1        (Example-Fake-DL-1)
Fake DL 2       (Example-Fake-DL-2)
...

Delegated mailboxes to '[email protected]':
================================
Other User
Vacation Calendar
Shared Info Mailbox
...

PS C:\example\exo_user_audit>