In the Single sign-on tab Under SAML Certificates, click Download the certificate as Certificate (Base64)
Login to WNM and navigate to Certificates
Click Import
Select Import a X.509 public certificate (without private key) from a PEM encoded file (used in Guest Portal SAML Authentication), add the certificate name, description and select the file downloaded in the step 14
Navigating to Policies | SSID Policies add a new SSID or edit the existing one
Give a name to the SSID and set the Authentication Type as open
In the Guest Portal tab select Sign On with SAML
Copy the Microsoft Extra Identifier (from Azure) paste to the WNM Server ID (or IssuerURL) and copy Login URL(from Azure) and paste to Authentication Service (Idp SSO) URL (WNM)select the certificate imported and click Save
Now you can connect to the SSID and you should be redirected to the SonicWall Guest Portal login page
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