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.

Timeout

Name Limit
Request Timeout for synchronous calls 120 Seconds
Request Timeout for Async calls Configurable. Max is 30 days.

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 90 The default is 4. To change the default use action settings
Retry max delay 1 day
Retry min delay 5 seconds

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, any pending steps time-out. Timed-out approvals are removed from the approvals center. If someone attempts to approve a timed-out request, they’ll receive an error message.
Storage retention 30 days This is from the run start time.
Min recurrence interval 1 minute
Max recurrence interval 500 days
Max run history retention 28 days, per GDPR rules.
Minimum postpone interval - Free and Plan 1 license 5 seconds
Minimum postpone interval - Plan 2 license 1 second

Looping and debatching limits

These are limits for a single flow run.

Name Limit Notes
Apply to each items - Free license 5,000 You can use the filter action to filter larger arrays as needed.
Apply to each items - Plan 1 and Plan 2 license 100,000 You can use the filter action to filter larger arrays as needed.
Until iterations 5,000
SplitOn items - Free license 5,000
SplitOn items - Plan 1 and Plan 2 license 100,000
Apply to each Parallelism 50 By default, loops run in sequence (essentially, parallelism is 1). You can configure up to 50 in parallel.
Actions executions per 5 minutes - Free and Plan 1 license 2,000 Also, you can distribute a workload across more than one flow as needed.
Actions executions per 5 minutes - Plan 2 license 100,000 Also, you can distribute a workload across more than one flow as needed.
Actions concurrent outgoing calls - Free and Plan 1 license ~500 Reduce the number of concurrent requests or reduce the duration as needed.
Actions concurrent outgoing calls - Free and Plan 1 license ~2,500 Reduce the number of concurrent requests or reduce the duration as needed.

Throughput limits

Name Limit Notes
Runtime endpoint - Number of read calls allowed per 5 minutes - Free and Plan 1 license 6,000
Runtime endpoint - Number of read calls allowed per 5 minutes - Plan 2 license 60,000
Runtime endpoint: Invoke calls per 5 minutes - Free and Plan 1 license 4,500
Runtime endpoint: Number of invoke calls per 5 minutes - Plan 2 license 45,000
Amount of throughput allowed per 5 minutes - Free and Plan 1 license 600 MB
Amount of throughput allowed per 5 minutes - Plan 2 license 6 GB
Amount of content flows are allowed to produce (actions inputs/outputs) per hour - Free, Plan 1 and Plan 2 license 200 GB

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 8 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.

Important

Some calls a flow makes may come from IP addresses that are listed in the Logic apps documentation. Some examples of these calls include HTTP or HTTP + OpenAPI.

Logic Apps

Calls made from a flow go directly through the Azure Logic App service. Some examples of these calls include HTTP or HTTP + OpenAPI. Please reference the Logic apps documentation for which IP addresses are used by that service.

Connectors

Calls made from a connector in a flow (for example, the SQL API or the SharePoint API) will come from the IP addresses listed here:

Region Outbound IP
Asia Pacific 13.75.36.64 - 13.75.36.79, 13.67.8.240 - 13.67.8.255, 52.175.23.169, 52.187.68.19
Australia 13.70.72.192 - 13.70.72.207, 13.72.243.10, 13.77.50.240 - 13.77.50.255, 13.70.136.174
Canada 13.71.170.208 - 13.71.170.223, 13.71.170.224 - 13.71.170.239, 52.237.24.126, 40.69.106.240 - 40.69.106.255, 52.242.35.152
Europe 13.69.227.208 - 13.69.227.223, 52.178.150.68, 13.69.64.208 - 13.69.64.223, 52.174.88.118, 137.117.161.181
India 104.211.81.192 - 104.211.81.207, 52.172.211.12, 40.78.194.240 - 40.78.194.255, 13.71.125.22, 104.211.146.224 - 104.211.146.239, 104.211.189.218
Japan 13.78.108.0 - 13.78.108.15, 13.71.153.19, 40.74.100.224 - 40.74.100.239, 104.215.61.248
South America 191.233.203.192 - 191.233.203.207, 104.214.19.48 - 104.214.19.63, 13.65.86.57, 104.41.59.51
United Kingdom 51.140.148.0 - 51.140.148.15, 51.140.80.51, 51.140.211.0 - 51.140.211.15, 51.141.47.105
United States 13.89.171.80 - 13.89.171.95, 52.173.245.164, 40.71.11.80 - 40.71.11.95, 40.71.249.205, 40.70.146.208 - 40.70.146.223, 52.232.188.154, 52.162.107.160 - 52.162.107.175, 52.162.242.161, 40.112.243.160 - 40.112.243.175, 104.42.122.49
Preview (United States) 13.71.195.32 - 13.71.195.47, 52.161.102.22, 13.66.140.128 - 13.66.140.143, 52.183.78.157

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

Required services

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

Domains Protocols Uses
management.azure.com https Access to the Azure Resource Manager.
login.microsoft.com
login.windows.net
login.microsoftonline.com
secure.aadcdn.microsoftonline-p.com
https Access to Active Directory Authentication Library (ADAL).
graph.microsoft.com
graph.windows.net
https Access to Azure AD Graph API - for getting user information such as a profile photo.
*.azure-apim.net https Access to the Runtime for Connectors.
*.flow.microsoft.com https Access to the Microsoft Flow site.
*.powerapps.com https Access to the PowerApps site.
*.azureedge.net https Access to the Microsoft Flow CDN.
nps.onyx.azure.net https Access to NPS (Net Promoter Score).