Manually configure Outlook for Office 365
In case you ever need to configure Outlook for an Office 365 tenant that *does not* have AutoDiscover records published, here is how to do it.
1. Log into PowerShell for tenant and run the following command: Get-Recipient | Select-Object Identity,Mail,ExchangeGuid | Export-Csv .\recipientlist.csv
3. Launch mail control panel applet and begin to configure a new profile.
6. Paste the ExchangeGuid value in the Server field and append the SMTP domain (ExchangeGuid@domain.com). Enter the user’s email address in the User Name field. Then, click the More Settings … button.
7. On the security tab, clear the Encrypt data between Microsoft Outlook and Microsoft Exchange box under the Encryption section and select Anonymous Authentication in the Logon network security section.
11. Click Next.