Error 429 Outlook 365

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Posted on 1 Feb 2018 13:03:54 by CMS

I have a flow that runs once every 15 minutes.

It grabs 25 emails from a mailbox, marks each as read, then moves each to a folder. I keep running into 429 "too many requests". As far as I can tell the flow should be well below the API limits, so what's going on?

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v-micsh-msft on 03 Feb 2018 at 04:49:05

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Re: Error 429 Outlook 365

Hi @CMS,

Could you please share a screenshot of the error message?

The API limit of the Outlook 365 connector is 900 calls per connection, and its renewal period is 60 seconds.

So if the Flow you added would create two many calls within one minute, then you might receive the too many requests reminding.

To workaround this, take a try to add a delay between the actions, around 30 seconds or 1 minute, which should overcome this error.

For the other limits that might be related, check:

Limits and configuration in Microsoft Flow

Regards,

Michael