I created Azure Wordpress app service using Azure default Wordpress template by following Ms Doc.

Thanks @Sina Salam for clear steps to change the file permissions in WordPress on Azure App Services.

I opened the kudu console by using below URL.

https://<AzureWordpressWebAppName>.scm.centralus-01.azurewebsites.net/

After that I clicked on the Bash and followed below steps.

• First, I navigated to the wwwroot folder by using cd site/wwwroot.

• To change the directory permission from 777 to 775, I ran the below command.

chmod 755 /home/site/wwwroot/<DirectoryName>
chmod 644 /home/site/wwwroot/<FileName>

I ran the command below to see if the permissions changed.

ls -ld /home/site/wwwroot/<DirectoryName>
ls -ld /home/site/wwwroot/<FileName>