Beginning with Office 2016 Outlook auto-connects to 365 upon opening. This causes users to be prompted for credentials if their account is on-premise. To disable this, run this in PowerShell as the user: Set-ItemProperty -Path HKCU:\software\Microsoft\Office\16.0\Outlook\AutoDiscover -Name ‘ExcludeExplicitO365Endpoint’ -Value 1 -Type DWord -Force
Outlook requires a data file be scanned when it has detected corruption. This can prevent users from accessing the program. To bypass this requirement the following registry key can be altered.
Here is what to expect when a mailbox is in repair mode :
Set-MailboxSentItemsConfiguration Enables you to configure the Sent Items folder to which a message is copied. Set-MailboxSentItemsConfiguration
Create a .reg file with this and add it to the registry.
Navigate to this location for the user and delete both folders: /Users/me/Library/Group Containers/UBF8T346G9.Office/Outlook/Outlook 15 Profiles/Main Profile/
If the “Signatures” button fails to open the dialogue box for changing your signature, you can take the following steps: Locate: [HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{0006F03A-0000-0000-C000-000000000046}\LocalServer32] Direct it to outlook.exe This file can be renamed .reg and imported to fix this issue on Office 365: Office365
If Outlook for Mac repeatedly asks for a password when connecting to an Office 365 e-mail account you need to: Open Utilities > Keychain > delete items referencing: “exchange” “adal” and “office”.
You can list all users with Mailbox permissions with this in PowerShell: Get-Mailbox | Get-MailboxPermission | where {$_.user.tostring() -ne “NT AUTHORITY\SELF” -and $_.IsInherited -eq $false} | Select Identity,User | Export-Csv -NoTypeInformation mailboxpermissions.csv
Copy the AutoComplete list The steps to export and import the AutoComplete list are different, depending on the version of Outlook that you are using.