@Trevor Robbins, Thanks for posting in Q&A.
To clarify this issue, please check the following.
1.Check if there exist some Intune policy, like conditional access policy, compliance policy that may force Local Administrator account to change their password at next sign in.
2.Check the if there exist security baselines that force Local Administrator account to change their password at next sign in in Intune portal.
If there is any unclear, feel free to contact us.
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