installer of 21.04 not allowing to use dot symbol in AD administrator username

[Evgeniy Dolgikh]

So I just tried to install ubuntu 21.04 and checkout how new Active Directory integration works.
During installation I checked options to use Active Directory features and on next screen I has ben asked to enter AD domain name and AD administrator credentials.

In my users in ad always have dot symbol in their logins e.g. j.doe, administrators also, but installer displays error message and not allowing enter my administrator user credentials.

I think is a bug cause Active Directory has no restrictions for dots in usernames.

[Ubuntu Foundations Team Bug Bot (crichton)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. It seems that your bug report is not filed about a specific source package though, rather it is just filed against Ubuntu in general. It is important that bug reports be filed about source packages so that people interested in the package can find the bugs about it. You can find some hints about determining what package your bug might be about at https://wiki.ubuntu.com/Bugs/FindRightPackage. You might also ask for help in the #ubuntu-bugs irc channel on Freenode.

To change the source package that this bug is filed about visit https://bugs.launchpad.net/ubuntu/+bug/1925786/+editstatus and add the package name in the text box next to the word Package.

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[Jean-Baptiste Lallement (jibel)]

Thanks for your report.

Current implementation validates the username with the same function than linux one and must be changed to follow the restrictions on MS Windows / AD.

Marking as triaged.

[Brian Murray (brian-murray)]

Ubuntu 21.10 (Impish Indri) has reached end of life, so this bug will not be fixed for that specific release.