Windows 2019 ESS - user license error

Nu Finis 1 Reputation point
2022-02-02T01:39:50.39+00:00

I've upgraded from an old SBS2011 server to a new ESS2019, and am getting a user license error . "The User Count Check detected a condition in your environment that is out of compliance with the licensing policy. This server will be automatically shut down if the issue is not corrected in 6 day(s) 1 hour(s) 30 minute(s). Please look for additional events for User Count Check to troubleshoot"

Looking for users I've found some old which Ive deleted but there are still more than 25 due to leftover accounts from SBS such as:
samaccountname name lastlogondate

SM_e4d7e02f94484c098 SystemMailbox{1f05a927-3569-4a1e-82de-ec1a34d424af}
SM_fc31af99f33f40e2a SystemMailbox{e0dc1c29-89c3-4034-b678-e6c29d823ed9}
Network Admin Network Administrator
SM_3bc6cbfe1ddc470a9 FederatedEmail.4c1f4d8b-8179-4148-93bf-00a95fa1e042
SM_84310abdc6aa45b39 DiscoverySearchMailbox {D919BA05-46A6-415f-80AD-7E09334BB852}
User Tmpl User Template
Power User Tmpl Power User Template
Standard User Standard User
Mobile User Tmpl Mobile User Template
Guest Guest
WebWorkplaceTools Standard User with administration links
SBS Backup User Backup User
Administrator Tmpl Administrator Template
krbtgt krbtgt

Can these be safely deleted? Are they even counted by ESS2019? Stopped using SBS2011 Exchange long long ago

Thanks

Windows Server
Windows Server
A family of Microsoft server operating systems that support enterprise-level management, data storage, applications, and communications.
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  1. Dave Patrick 426.1K Reputation points MVP
    2022-02-02T02:21:21.907+00:00

    Looks like most can be deleted.
    https://server-essentials.com/community/discussions/delete-old-accounts-after-migration

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