Windows 7 Ultimate (BitLocker encrypted) losing mapped drives to NAS

The environment:

- About 12 Win7 Ultimate Thinkpad laptops on the LAN here

- Workgroup - no Windows domain here (yet)

- Users' logon credentials for their computer are unrelated to their logon credentials for the NAS; no LDAP or Driectory service of any kind in play here

- About 50 Mac's & 30 Windows laptops on the LAN here, no servers, just the NAS

- Wireless & wired LAN connections in play, doesn't seem to matter which I'm using


The problem:

- A couple weeks ago I started hearing from a couple Win7 users that their mapped drives would be lost (re-prompting for logon credentials) after a reboot or even just a log-off

- Since then it's grown to 3 Windows7 laptops doing this, all of them pointed to the same NAS box, which is a Synology NAS


What I've tried so far (things I've found in my online research):

1) During my troubleshooting I took note of the link at the bottom of the Map Network Drive that reads Connect to a Web site that you can use to store your documents and pictures. I mapped the G drive as usual then went back and clicked through the link which brought up the Add Network Location Wizard. I followed the steps in the wizard to set a new Network Location

2) Go to Control panel -> windows firewall -> Advanced settings ( on your left ) -> Outbound Rules ( on your left ) -> Search in the list the next items and " Enable Rule " ( on your right )

File and Printer Sharing (Echo Request - ICMPv4-Out) --enable all of them ( usualy 2 or 3 entries ) ... you can enable the ones of IPv6 as well if your lan uses that protocol ;
File and Printer Sharing ( NB-Name-Out ) -- this is that Samba file sharing, port 137 -- enable all of them ;
File and Printer Sharing ( NB-Session-Out ) -- Samba again , but on 139 --enable all of them ;
File and Printer Sharing ( SMB-Out ) -- again Samba but on 445 --enable all of them .

After this just a small reconnect on the previously connected drives ( double click in my computer ) reboot and everything will be ok.
This will work if you already have the user and passes set for those specific shares or they are set as anonymous, or Everyone, recently known, as M$ decided to rename it.

3) Created a brand new profile for the user but same results under that new profile.


The end. :)

Thanks for any help!
Who is Participating?
David Johnson, CD, MVPConnect With a Mentor OwnerCommented:
Bitlocker is a non issue here.
Control Panel - Credential manager add the credentials to the nas here
WineGeekAuthor Commented:
Thanks ve3ofa. Trying that now. Any ideas why this would suddenly start happening and only with 3 out of several users all attaching to the same folders on the same NAS? :)
WineGeekAuthor Commented:
ok using the Credential Manager is not working either. In fact, if I add the credentials under the Windows section of CredMgr, it's no longer there in CredMgr after I reboot.
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