I would prefer to not be logged into any account on Office applications unless I specifically choose to. Managed to login fine with both of my Outlook accounts as well as my university's o365 account, however when I opened any other Office 2019 application (Word, Powerpoint etc.) I was logged in to all 3 accounts. To audit everything from every mailbox, run the following command: (Get-Mailbox).Recently reinstalled Windows 10 and have been setting up my email accounts on Outlook 2019. To group mailboxes by what is enabled, run the following commands: $Group = $Mailboxes | Group-Object AuditEnabled,AuditDelegate | Select- Object Expression= $Group | Format-Table -AutoSize To get all mailboxes, run the following command: $Mailboxes = (Get-Mailbox) To enable the admin audit log, run the following command: Set-AdminAuditLogConfig -UnifiedAuditLogIngestionEnabled $true To open the credentials prompt for O365, run the following commands: $Session = New-PSSession -ConfigurationName Microsoft.Exchange - ConnectionUri - Credential $UserCredential -Authentication Basic -AllowRedirection Import-PSSession $Session

In the Windows PowerShell Credential Request dialog box, type your O365 user name and password, and then click OK.

Open Windows PowerShell on your local system, and then run the following command: $UserCredential = Get-Credential

Before mailbox auditing was turned on by default, you had to manually enable it for every user mailbox in your organization. This means that certain actions performed by mailbox owners, delegates, and admins are automatically logged, and the corresponding mailbox audit records will be available when you search for them in the mailbox audit log.

Starting in January 2019, Microsoft turned on mailbox audit logging by default for all organizations.

Log in o365