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 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, any pending steps time-out. Timed-out approvals are removed from the approvals center. If someone attemps 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.

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
Asia 168.63.200.173, 13.75.89.159, 23.97.68.172, 13.75.94.173, 40.83.127.19, 52.175.33.254, 52.163.93.214, 52.187.65.81, 52.187.65.155, 13.76.133.155, 52.163.228.93, 52.163.230.166
Australia 13.75.153.66, 104.210.89.222, 104.210.89.244, 13.75.149.4, 104.210.91.55, 104.210.90.241, 13.73.115.153, 40.115.78.70, 40.115.78.237, 13.73.114.207, 13.77.3.139, 13.70.159.205
Canada 52.233.29.92, 52.228.39.241, 52.228.39.244, 52.232.128.155, 52.229.120.45, 52.229.126.25
Europe 13.79.173.49, 52.169.218.253, 52.169.220.174, 40.113.12.95, 52.178.165.215, 52.178.166.21, 13.95.155.53, 52.174.54.218, 52.174.49.6, 40.68.222.65, 40.68.209.23, 13.95.147.65
India 52.172.157.194, 52.172.184.192, 52.172.191.194, 52.172.154.168, 52.172.186.159, 52.172.185.79, 52.172.9.47, 52.172.49.43, 52.172.51.140, 52.172.50.24, 52.172.55.231, 52.172.52.0
Japan 13.71.146.140, 13.78.84.187, 13.78.62.130, 13.71.158.3, 13.73.4.207, 13.71.158.120, 40.74.140.173, 40.74.81.13, 40.74.85.215, 40.74.140.4, 104.214.137.243, 138.91.26.45
United States 137.135.106.54, 40.117.99.79, 40.117.100.228, 13.92.98.111, 40.121.91.41, 40.114.82.191, 52.160.90.237, 138.91.188.137, 13.91.252.184, 52.160.92.112, 40.118.244.241, 40.118.241.243

Services

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
Asia 13.75.36.64 - 13.75.36.79, 13.67.8.240 - 13.67.8.255, 52.175.23.169, 52.187.68.19, 52.163.91.227, 52.163.89.40, 52.163.89.65, 52.163.95.29, 13.75.89.9, 13.75.91.198, 13.75.92.202, 13.75.92.124
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, 13.77.7.172, 13.70.189.7, 13.70.187.251, 13.70.82.210, 13.73.203.158, 13.73.207.42, 13.73.205.35, 13.70.191.49
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, 52.233.30.222, 52.233.30.148, 52.233.30.199, 52.233.29.254, 52.232.130.205, 52.229.126.118, 52.229.126.28, 52.229.123.56
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, 52.166.241.149, 52.166.244.232, 52.166.245.173, 52.166.243.169, 40.69.45.126, 40.69.45.11, 40.69.45.93, 40.69.42.254
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, 52.172.54.172, 52.172.55.107, 52.172.55.84, 52.172.51.70, 52.172.158.185, 52.172.159.100, 52.172.158.2, 52.172.155.245
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, 104.214.137.186, 104.214.139.29, 104.214.140.23, 104.214.138.174, 13.78.85.193, 13.78.84.73, 13.78.85.200, 13.78.86.229
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, 51.140.80.51, 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, 104.43.232.28, 104.43.232.242, 104.43.235.249, 104.43.234.211, 52.160.93.247, 52.160.91.66, 52.160.92.131, 52.160.95.100, 40.117.101.91, 40.117.98.246, 40.117.101.120, 40.117.100.191
United States (Early Access) 13.71.195.32 - 13.71.195.47, 52.161.102.22, 13.66.140.128 - 13.66.140.143, 52.183.78.157, 52.161.26.191, 52.161.27.42, 52.161.29.40, 52.161.26.33, 13.66.213.240, 13.66.214.51, 13.66.210.166, 13.66.213.29

For example, if you must authorize 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
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.
psux.azureedge.net https Access to the Microsoft Flow CDN.
nps.onyx.azure.net https Access to NPS (Net Promoter Score).