This is a quick work around that can be used for POC of office 365 in a none persistent VDI environment.
Office 365 stores its login credentials in the Windows Credential Manager. I believe this will allow automatic authentication for 180 days (TBC) before having to enter credentials again.
UEM can capture the contents of Credential Manager by creating a new import/export setting as shown in the screenshot below.
To enable SSO with Office 365, you should follow Microsoft example on how to integrate this properly with ADFS. Blog post here https://blogs.technet.microsoft.com/canitpro/2015/09/11/step-by-step-setting-up-ad-fs-and-enabling-single-sign-on-to-office-365/