Hello than you for your time and attention to this question.
The following issue has been a the bane of my existence for over a month now. Any and all input is greatly appreciated.
We have a site that has a mix environment (windows and Mac’s all new hardware) Mac run Mr. Lion, Server is 2012 standard. The macs are joined to the windows domain (hardwired). Users sign on with their domain accounts. There are two SMB shares mapped to the mac’s. One to the server and another to a Synology NAS (also on the domain).
The issue that the Mac users face is occurs intermittently. The EU is presented w/ a challenge to enter UN and PW when attempting to move or rename files/folders on the server share. We tried typing the domain account and local user account to no avail. When they try again an hr. later or so they are able to rename and move files. They did not log off or reboot in the meantime.
Here’s what I have tried so far to no avail:
-	Ensured that both Mac’s OS (Mr. Lion) is up to date with all patches.
-	Ensure that the Mac’s are joined to the domain correctly.
-	I have checked and rechecked all the folder and file permissions. Users and Mac’s have full access to the network folder’s
-	I was also followed instructions found here http://support.apple.com/kb/ts3248
which had me edit the info.plist file (network timeout) and add server name to mac host file.