Update Graph API Client Secret

A client secret in the context of Microsoft Graph refers to a password that an application uses to authenticate with the Microsoft identity platform.

A client secret is required as part of the Microsoft Authentication Framework for an application to access resources in Office 365. 

Client Secrets expire after a period of time.  The maximum time a client secret is valid for is 24 months. 

To update the client secret the follow these steps:

STEP 1 - obtain the existing Application ID from Azure portal

• Select App registrations from the Azure portal
• Locate the existing app registration for fax servers
• Select the app registration for fax servers
• Copy the value 'Application (Client) ID and save into a safe location.

STEP 2 - locate the Client Secret section in Azure

• Select Certificates and secrets (located under the Manage section) of the app registration
• Do not touch the existing client secret
• Create a new client secret

• Copy the new Client Secret value and store in a safe location for later use.

STEP 3 - Update Fax Server settings

• Schedule a change request
• Login to the fax server. (repeat for each fax server which uses this client secret)
• Run the msXfax console
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• Select 'Edit Application Id/Secret
• The existing values will be removed
• Supply the values that you saved earlier in this article
• Press Apply
• Run an elevated command prompt
• FAXSTOP
• Check that all fax services are stopped in Services Control Manager (Services.msc)
• FAXSTART
• Confirm that all fax services start 
• Send a test fax from Outlook to confirm that the fax was processed by the Graph Service: Office365 via Graph
• Allow 2 minutes 
• If nothing happened check the Graph service log
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