When using the CRM Vertex portal solution with Microsoft Dynamics CRM Online, we recommend creating a service account that the portal impersonates when communicating with Dynamics CRM. One of the challenges we have seen is that, by default, Office 365 user passwords are set to expire after 90 days. For a normal user, this security measure is important and makes sense, but for a service account it can cause issues. If the password expires, your portal configuration will need to be altered for the portal to connect to CRM again. This means downtime for your portal until that configuration is completed. To combat this issue, we recommend setting the service accounts password to never expire. To do this with Office 365 accounts, you must use PowerShell. Microsoft Office Support has prepared a great article and tutorial on how to accomplish this task. Visit https://support.office.com/en-US/Article/Set-up-user-passwords-to-never-expire-f493e3af-e1d8-4668-9211-230c245a0466 for more information on setting password to never expire within Office 365.
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