Microsoft 365 URL and IP requirements
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Data columns shown are:
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- **ID**: The ID number of the row, also known as an endpoint set. This ID is the same as is returned by the web service for the endpoint set.
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- **Category**: Shows whether the endpoint set is categorized as **Optimize**, **Allow**, or **Default**. This column also lists which endpoint sets are required to have network connectivity. For endpoint sets that aren't required to have network connectivity, we provide notes in this field to indicate what functionality would be missing if the endpoint set is blocked.
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You can read about these categories and guidance for their management in [Optimizing connectivity to Microsoft 365 services](microsoft-365-network-connectivity-principles.md#optimizing-connectivity-to-microsoft-365-services).
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- **ER**: This is **Yes** if the endpoint set is supported over Azure ExpressRoute with Microsoft 365 route prefixes. The BGP community that includes the route prefixes shown aligns with the service area listed. When ER is **No**, this means that ExpressRoute isn't supported for this endpoint set.
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Some routes may be advertised in more than one BGP community, making it possible for endpoints within a given IP range to traverse the ER circuit, but still be unsupported. In all cases, the value of a given endpoint set's ER column should be respected.
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- **Addresses**: Lists the FQDNs or wildcard domain names and IP address ranges for the endpoint set. Note that an IP address range is in CIDR format and may include many individual IP addresses in the specified network.
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- **Ports**: Lists the TCP or UDP ports that are combined with listed IP addresses to form the network endpoint. You may notice some duplication in IP address ranges where there are different ports listed.
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## [Microsoft 365 Unified Domains](cloud-microsoft-domain.md)
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## Related Topics
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−[Other endpoints not included in the Microsoft 365 IP Address and URL Web service](additional-office365-ip-addresses-and-urls.md)
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−[Managing Microsoft 365 endpoints](managing-office-365-endpoints.md)
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−[General Microsoft Stream endpoints](/stream/network-overview#general-microsoft-stream-endpoints)
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−[Monitor Microsoft 365 connectivity](./monitor-connectivity.md)
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−[Client connectivity](https://support.office.com/article/client-connectivity-4232abcf-4ae5-43aa-bfa1-9a078a99c78b)
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−[Content delivery networks](https://support.office.com/article/content-delivery-networks-0140f704-6614-49bb-aa6c-89b75dcd7f1f)
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−[Microsoft Azure IP Ranges and Service Tags – Public Cloud](https://www.microsoft.com/download/details.aspx?id=56519)
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−[Microsoft Azure IP Ranges and Service Tags – US Government Cloud](https://www.microsoft.com/download/details.aspx?id=57063)
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−[Microsoft Azure IP Ranges and Service Tags – China Cloud](https://www.microsoft.com/download/details.aspx?id=57062)
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−[Microsoft Public IP Space](https://www.microsoft.com/download/details.aspx?id=53602)
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−[Service Name and Transport Protocol Port Number Registry](https://www.iana.org/assignments/service-names-port-numbers/service-names-port-numbers.xhtml)
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+- [Other endpoints not included in the Microsoft 365 IP Address and URL Web service](additional-office365-ip-addresses-and-urls.md)
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+- [Managing Microsoft 365 endpoints](managing-office-365-endpoints.md)
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+- [General Microsoft Stream endpoints](/stream/network-overview#general-microsoft-stream-endpoints)
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+- [Monitor Microsoft 365 connectivity](./monitor-connectivity.md)
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+- [Client connectivity](microsoft-365-networking-overview.md)
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+- [Content delivery networks](content-delivery-networks.md)
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+- [Microsoft Azure IP Ranges and Service Tags - Public Cloud](https://www.microsoft.com/download/details.aspx?id=56519)
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+- [Microsoft Azure IP Ranges and Service Tags - US Government Cloud](https://www.microsoft.com/download/details.aspx?id=57063)
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+- [Microsoft Azure IP Ranges and Service Tags - China Cloud](https://www.microsoft.com/download/details.aspx?id=57062)
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+- [Microsoft Public IP Space](https://www.microsoft.com/download/details.aspx?id=53602)
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+- [Service Name and Transport Protocol Port Number Registry](https://www.iana.org/assignments/service-names-port-numbers/service-names-port-numbers.xhtml)
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