MailboxConcurrency

Question

Hi !

I'm using Graph API to list emails using batching. I'm trying to handle correctly throttling errors of MailboxConcurrency.

I've noticed in my logs some occurences where I'm still getting this error even when I apply a retry of only 1 concurrent call so I'm a little confused.

Is it possible that another application also affects the throttling counter? I can confirm that my application is not sending any other concurrent requests.

Do you have any other idea on how to handle MailboxConcurrency throttling better ?

Thanks in advance

Answer 1

Hi geoffrey rannou,

As per Microsoft documentation,

Exceeding the limit for one mailbox doesn't affect the ability of the application to access another mailbox.

Outlook service limits for JSON batching

When targeting the same mailbox, apps that allow multiple batch requests to run in parallel can use either of the following approaches:

• If the individual requests don't have to be ordered, have individual requests from a single batch run concurrently.
• Use the dependsOn property to order requests in a batch and have up to four such batch requests run concurrently.

Hope this helps.

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