I found the solution : the problem was the pricing of my Azure Analysis Service. I switched it from Basic tier B2 to Standard tier S1. I am now able to use multiple partitions.
I have SSAS model (tabular) on Azure and I'm trying to add a partition to a table. When I try to deploy my solution, I get the following error message :
Failed to save changes to the server. Error returned: "This edition of SQL Server Analysis Services supports only one partition per table."
How do I configure the number of partition allowed ?
I found the solution : the problem was the pricing of my Azure Analysis Service. I switched it from Basic tier B2 to Standard tier S1. I am now able to use multiple partitions.