To use Microsoft integration, you will need to register an application in the Microsoft Azure portal, sign in (if you don't have an account yet) to the Microsoft Azure using either work, school account or a personal Microsoft account.
Make sure that your RelateCRM installation is publicly available and uses the https protocol, as Microsoft uses Webhooks and makes requests to the application in order to synchronize calendar events.
Go to Microsoft Azure App Registrations.
Click New registration.
Application name
Enter a meaningful application name that will be displayed to users of the app.
Supported account types
Select Accounts in any organizational directory (Any Azure AD directory - Multitenant) and personal Microsoft accounts (e.g. Skype, Xbox)
Redirect URI
You can retrieve your Microsoft Redirect URI in RelateCRM Settings->Integrations->Microsoft
After you create the application you must add the required permissions for the application.
Go to the application you just created.
On the sidebar click API Permissions.
Click Add a permission.
Click on Microsoft Graph.
Click on Delegated Permissions.
Search and select the following permissions:
After you add all the permissions, your permissions table should look like this:
On the sidebar click Certificates and secrets.
Click the Client secrets tab.
Click New Client Secret.
Add meaningful description e.q. "RelateCRM Secret".
Set expires to "24 months".
Click "Add".
After you create the secret, copy the new client secret value. You won't be able to retrieve it after you perform another operation or leave the Certificates and secrets page.
Now, the final step is to add the application id and the secret key in RelateCRM.