The objectid.dat file maps global object identifiers to local names.
You need to change this file only if you have changed the local name of the LAN Manager in the libtcl.cfg file.
The file contains sections such as [CHARSET] for character sets and [SECMECH] for security services. Of interest here is the security section.
The following example is a security section excerpt from the objectid.dat file:
[secmech] 18.104.22.168.4.1.822.214.171.124 = NTLM
You can specify only one local name for LAN Manager. Use any text editor to edit this file.
WARNING! Do not change the “126.96.36.199.4.1.8188.8.131.52” identification.