SSO and multiple agent accounts

Summary

Allow agents to log in to several accounts using SSO

Content

Has anyone implemented SSO where some of their users have more than one agent account?

We have a proportion of users who have two accounts because, for example, they work part time in different departments.

Previously we would give them a different login. But now we are switching on SP initiated SSO they will only be able to log into one of those accounts (the one where their login matches their username in our Identity Provider).

Any ideas for a work around?

Version

19A