I am having an issue with our Server 2008 R2 Standard DC and machines running Windows 7 or later.
Our environment consists of one server, the 08 R2, and it acts as our AD, DHCP, DNS, Fileserver, ISS Server, and Print Server.
The issues we are seeming to have is that clients will receive "There are currently no logon servers available to service the logon request" at random times, which after 15-20 seconds will no longer occur and they can log in without problems. Also, as part of our environment we have 2 machines running Server 2008 R2 that are using NComputing software to act as though they are independent Windows 7 Machines. The error received on these machines is "No RPC Server Available" when trying to log on.
From what I have noticed the server is losing connection to the clients and having to re-establish a connection before it can proceed with the desired action. Normally if I can log on as a local admin, ping the server, then all is well.
I have tried changing the registry setting on the server of the LanmanServer Parameter "autodisconnect" and changed it to "ffffffff", removing the 15 minute timeout. This still has not solved our problem.
Other issues that I have noticed is when remotely connected to the server (mstsc) from my machine it will randomly lose connection and have to re-establish. And also, clients are seeing a red "X" over their network share at different times throughout the day, all random, which normally disappears when they click on their shared drive. Also, (This list gets longer the more I look into it) at random times our clients will receive issues with the DNS server while surfing the internet as it will give them an Unable to Connect error, generally this resolves itself in a short time frame.
I know there is bound to be some issue occurring as these are availability problems for most as these issues always seem to occur at the most in-opportune times. Any help would be greatly appreciated.