What OS are you having problems connecting to? Are they all the same?

After verifying those systems are connected to the domain (and don’t have some custom/separate GPO that may be interfering with the connection), don’t have some Endpoint/AV Protection interfering, or with a local administrator account on the system if there is a common account you can use or add to test, you can look in the stored credentials:

  • 7.4: Settings > Network Scan > Stored Passwords > WMI > Existing Accounts
  • 7.5: Settings > Inventory > Device Scanning > Stored Passwords > WMI

Also try some of these resources/topics: