Fix for invalid email address

[npnigro]

Strip out '#' from unique name. This helps address an issue with external users that have a Microsoft account (as opposed to a Work/School account).

[psignoret]

Let me dig into this a bit more and see what options there are. I'm not a fan of just taking whatever comes after the # character, because I can only assume that can change in the future (it has already changed once, if I'm not mistaken).

[npnigro]

I hear you, but the code on the trunk doesn't work for these users. It's a patch of a known/reproducible issue, at least.

[psignoret]

It is, but this patch results in state which gets persisted in WordPress. If we find there's a better way to do this (e.g. a better way to get the unique email-like username), then it'll be too late for any user who was provisioned in this way.

[npnigro]

Good point. I suppose you could make it so the username includes the hashtag and only strip it out of the email address since we know that won't work?