Cross Forest Mapped Drive Issue

[ITGURU]

I am trying to map a drive from one domain to a shared folder on another domain. A full 2 way forest trust is setup and if i browse to the share from either site i can access it by UNC path without any issues.

However, when i create the map drive in GPO (where all the local mapped drives are), it doesnt map when the users login and in event viewer i get the error:

 

The user 'L:' preference item in the 'Windows 10 Mapped Drives {E420D45E-DBFD-4533-B840-1C6B596DF154}' Group Policy Object did not apply because it failed with error code '0x80070040 The specified network name is no longer available.' This error was suppressed.

 

There are no connection issues and on the share i have given permissions to the remote domain user group.

 

As i can access from explorer by UNC path I don't know why it wont map?

Any ideas/

 

Thanks in advance.

[MatthewL]

Can you map it via GPO using \\serverip\share or \\server.fqdn.domain\share?

[ITGURU]

Can you map it via GPO using \\serverip\share or \\server.fqdn.domain\share?

 

Both ways work fine if i map it manually on the client, however as soon as i put either into GPP 'mapped drives' section it doesnt map at login and get the above error.

[MatthewL]

In the same policy where you are mapping to the other domain can you map to something on the same domain?

[ITGURU]

In the same policy where you are mapping to the other domain can you map to something on the same domain?

all other mapped drives are in the same policy and they are all on the same domain. this mapped drive then points to another domains server IP or UNC path. doesn't map by either way but if enter the unc path into explorer I can access.

[LukeRowberry]

Does it work with net use in a bat file?

[chaplic]

Might be a left-field question, but is the account logging into the PC a local admin?

[ITGURU]

Might be a left-field question, but is the account logging into the PC a local admin?

Nope domain user . all works accessing by shortcut or unc in explorer just can't get it to auto map when the entry Is in GPP

[ITGURU]

Does it work with net use in a bat file?

that will be my next test

[ITGURU]

Nope domain user . all works accessing by shortcut or unc in explorer just can't get it to auto map when the entry Is in GPP

Seems the issue was sporadic - if i logged onto a pc say 1- times, it would map twice out the 10, really weird.

 

I've now changed DNS configuration to have conditional forwarders for the other domain rather than stub zone, logged on 8 times and appeared every time.

 

I'll be deploying servers for the other domain across 2 sites on different IP subnets, so in the conditional forwarder can i add the different subnet IPs in so if the link were to be lost it would still use DNS servers for that domain at each local site?

[ITGURU]

Seems the issue was sporadic - if i logged onto a pc say 1- times, it would map twice out the 10, really weird.

 

I've now changed DNS configuration to have conditional forwarders for the other domain rather than stub zone, logged on 8 times and appeared every time.

 

I'll be deploying servers for the other domain across 2 sites on different IP subnets, so in the conditional forwarder can i add the different subnet IPs in so if the link were to be lost it would still use DNS servers for that domain at each local site?

 

It would seem that wasn't the solution, waited a while, logged back on, drive didn't appear. Why would it be so random/

[fredbayker]

Does GPresult on the client machine give you any information? Have you added the dns suffix of the other domain?

[ITGURU]

Does GPresult on the client machine give you any information? Have you added the dns suffix of the other domain?

 

AS it's intermittent , no just the original post error appears in event viewer. If the server can be access via FQDN and by IP, then DNS Suffix list is irrelevant as get same behaviour when mapping via IP!