RDP: login fails when pasting password

I have a simple work-around for this and it is to use the shortcuts of Ctrl+C (Copy) Ctrl+V (paste) instead of the right-click menu.

Don't ask me why this works, but it does. :)

I had a similar issue. I was using Windows 7 on my workstation, and the issue was occuring with both Windows 2008 and Windows 2003 servers. I appeared to be pasting no extra characters - for an 8 character password, 8 circles appeared.

When logging in to a Windows 2003 server, after the login failed, I'd see 13 circles. However, if I intentionally typed an incorrect 8 character password, I'd see 8 circles. Clearly the password I thought I was sending was not being sent.

I used a third-party app (Ditto, in this case) to do a "Plain text paste". This login was successful. So somehow, extra data is being pasted. I'm living with this workaround, for now. I'm not sure if this is the case for you, but trying a "plain text paste" may help.

There is a hotfix (not included in a Windows Update) for this issue: https://support.microsoft.com/en-us/kb/2547752 (Windows 7/2008R2 with or without SP1)