Change password of service account used for deployment manager.

I have a 2016 on-prem installation of CRM.  We used multiple service accounts.  I need to log into the deployment manager and I know which service account is set as a deployment manager admin. The problem is, I don't have the password for this account anymore (I do - but I think it was fat fingered very consistently when the AD accounts were setup!!)

If I change the password for this particular account in AD, will it affect CRM in any negative way?  Is there any way of knowing this ahead of time?  Any way to see if the account was used for any other purpose or CRM service?