The short answer is: "No".
If you have access to FirstAgenda in an AD-organisation then you use your AD-mail to log in. However, if you afterwards get invited to a different oranisation - e.g. a board then you might receive the invitation in your AD-mail, but you can not use your AD-mail as username. This is because the AD-mail is "reserved" for your AD-organisation. Therefore, you have to set up a username for a different email address - e.g. by using Gmail.
In the future you will therefore have two different logins (= two different users) to FirstAgenda:
- Your AD-login (AD-mail) when you log in to your AD-organisation
- Your FirstAgenda-login when you log in to other organisations (boards in the example above)
To better understand why you need to use one type of login for AD organizations and another for external organizations, let's explain it differently:
Imagine your FirstAgenda account is a keychain - in this keychain, there are two keys. For technical and security reasons, these two keys grant access to two different things and must not be the same.
In this case, the two keys grant access to two different types of organizations: One key provides access to AD organizations, and the other key provides access to external organizations.
The key for AD organizations cannot be used for external organizations, and vice versa - that's why two different keys are necessary.
In summary: Your username for your AD organization must not be the same as for your external organizations.