Thanks for figuring this out! I will reproduce it and make it remove the saved password automatically.

I think it's because chrome blocks non ssl links now. I will setup ssl for it.

Yes you can upgrade. Those modules are also in 6.3.

Yes, please contact support.

A limit can be configured in config.php but it's also possible that the SMTP server limits the size. Do you get an error message?

Please create a support ticket if you have the pro version with support.

Yes, they are working on it.

$config['host'] should just be '/'; in your case. Not the full domain.

We've officially released 6.3! You can read the release notes here:

http://groupoffice.blogspot.com/2018/07/group-office-63-released.html

On Windows you could also use docker!

Only with 6.3.

We've fixed this issue in the latest version.

Please retest with the 6.3.27. We've fixed this issue.

Please upgrade and use the System settings UI.
We've fixed the issue.

Did you perhaps do a git checkout?

It seems the composer dependencies are not installed.

Please follow this procedure:

http://groupoffice.readthedocs.io/en/latest/index.html