Hi, The mapped drives are limited within 26-drive-letter, including local hard disk drive and optical drive. As far as I know, there is no number limit for mapped drives from a mapping server. You may run the command “net share” to list all the shares. For more information, please refer to the following Microsoft TechNet blog: How Can I Determine Which Drives are Mapped to Network Shares? http://blogs.technet.com/b/heyscriptingguy/archive/2005/10/27/how-can-i-determine-which-drives-are-mapped-to-network-shares.aspx Based on the current situation, please try the following suggestions to check the result: 1. Disable SMB Signing by navigating to HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\LanManServer\Parameters and modifying the EnableSecuritySignature value to 0. 2. Disable Restrictanonymous by navigating to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Lsa and modifying the RestrictAnonymous value to 0. Regards, Please remember to click Mark as Answer on the post that helps you, and to click Unmark as Answer if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.

Hi, The mapped drives are limited within 26-drive-letter, including local hard disk drive and optical drive. As far as I know, there is no number limit for mapped drives from a mapping server. You may run the command “net share” to list all the shares. For more information, please refer to the following Microsoft TechNet blog: How Can I Determine Which Drives are Mapped to Network Shares? http://blogs.technet.com/b/heyscriptingguy/archive/2005/10/27/how-can-i-determine-which-drives-are-mapped-to-network-shares.aspx Based on the current situation, please try the following suggestions to check the result: 1. Disable SMB Signing by navigating to HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\LanManServer\Parameters and modifying the EnableSecuritySignature value to 0. 2. Disable Restrictanonymous by navigating to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Lsa and modifying the RestrictAnonymous value to 0. Regards, Please remember to click Mark as Answer on the post that helps you, and to click Unmark as Answer if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.

Hi, I have server A (running Server 2008 Enterprise 32bit, R1, SP2) and server B (running Server 2003 Standard 32bit, SP2). Server A has an application on it that starts a lot of telnet sessions to itself, and each session does a mapping to a shared drive on server B (a "net use..." as part of the telnet connection). The mappings seem to build up on server B (as viewed with "net session" on server B) in excess of the number of telnet sessions actually running on server A. Eventually response to the mapped sessions on server A stops working, and new mappings will not work. The only solution we have found is to reboot server A to clear things out. It's as if server A has hit a ceiling on the number of mappings to the same share on server B that it can handle. (at this point server A can create mappings to other shares) So, is there a limit on the number of drive mappings (to the same drive) on one machine (server A)? Is there any way to enumerate/visualize all of the existing drive mappings on server A? (doing a net view only shows one mapped drive for the logged in user) thanks.