I am in the middle of a project where we have an existing Office365 setup and a new on-premise Active Directory, with ADFS and Windows Application Proxy configured.

I am at the stage where I need to convert the office365 domain to be a federated domain. What I am trying to find out is how this affects the existing office365 users.

I have created a matching set of users in the on-premise active directory and made sure they all use the correct upn of username @ domain .com

When I convert the domain to be a federated domain, will the users all have to then use whatever passwords are configured in the on-premise active directory or can they use both the on-premise and the existing office365 user/password?
Ideally I would like to migrate a few users at a time, is this possible or does it have to be all or nothing?

I don't want to just "give it a go" as there are around 50 users that could potentially be affected by this and I'd rather be able to say to them "at this specific time, your password will change to a new one" so that we can arrange for this to be done over a weekend or something.

Thanks in advance for any assistance.

John

Hi John,

Based on your description, please post your issue to Office 365 forum so that you can get more professional information and help about Office 365:

https://community.office365.com/en-us/f/

The reason why we recommend posting appropriately is you will get the most qualified pool of respondents, and other partners who read the forums regularly can either share their knowledge or learn from your interaction with us. Thank you for your understanding.

Regards,

Emi Zhang
TechNet Community Su