By default, windows server has a max password age = 42 days which requires a new password every 42 days.
For internal server this can be a pain...
Run the following two terminal commands to disable:
1. wmic UserAccount where Name='Administrator' set PasswordExpires=False
2. net accounts /maxpwage:0
By default, item 1 is likely already set, but it's good practice to verify.
Note: This should NOT be done for production server.
wmic UserAccount where Name='Administrator' get PasswordExpires
PasswordExpires
FALSE
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net accouints | findstr Max
Maximum password age (days): Unlimited