Limits and configuration in Microsoft Flow

This topic contains information about the current limits and configuration details for flows.

Request limits

These are limits for a single outgoing request.


Name Limit
Request Timeout 120 Seconds

Message size

Name Limit Notes
Message size 100 MB Not all APIs support the full 100MB.
Expression evaluation limit 131,072 characters @concat(), @base64(), string can't exceed this limit.

Retry policy

Name Limit
Retry attempts 4

Run duration and retention

These are the limits for a single flow run.

Name Limit Notes
Run duration 30 days Includes workflows with pending steps like approvals. After 30 days the pending steps will Time Out.
Storage retention 30 days This is from the run start time.
Min recurrence interval 1 minute
Max recurrence interval 500 days

Looping and debatching limits

These are limits for a single flow run.

Name Limit Notes
ForEach items 5,000 You can use the filter action to filter larger arrays as needed.
Until iterations 5,000
SplitOn items 5,000
ForEach Parallelism 1

Definition limits

These are limits for a single flow.

Name Limit Notes
Actions per workflow 250 You can add nested workflows to extend this as needed.
Allowed action nesting depth 5 You can add nested workflows to extend this as needed.
Max characters per expression 8,192
action/trigger name limit 80
description length limit 256

SharePoint limits

There are limitations on how you can use Microsoft SharePoint with Microsoft Flow and PowerApps.

IP address configuration

The IP address from which Microsoft Flow requests are sent depends on the region where the environment that contains the flow is located. We don't currently publish FQDNs available for flow scenarios.

Logic App Service

Calls made from a flow go directly through the Azure Logic App service. Some examples of these calls include HTTP or HTTP + OpenAPI. These calls come from the following IP addresses:

Region Outbound IP
United States,,,,,,,,,,,


Calls made from an API connected through a flow (for example, the SQL API or the SharePoint API) will come from the IP address specified below:

Region Outbound IP
United States,,,,,,,,,,,
United States (Early Access),,,,,,,

For example, if you must whitelist IP addresses for your Azure SQL database, you should use these addresses.

The following table lists the services to which Microsoft Flow connects. Ensure none of these services are blocked on your network.

Domains Protocols Uses https Access to the Azure Resource Manager.
https Access to Active Directory Authentication Library (ADAL).
https Access to Azure AD Graph API - for getting user information such as a profile photo.
* https Access to the Runtime for Connectors.
* https Access to the Microsoft Flow site.
* https Access to the PowerApps site. https Access to the Microsoft Flow CDN.