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Did you check the official documentation? <a href="https://docs.microsoft.com/en-us/azure/active-directory/connect/active-directory-aadconnect-ports" rel="ugc">https://docs.microsoft.com/en-us/azure/active-directory/connect/active-directory-aadconnect-ports</a><br />
<br />
Also refer to the O365 URLs and IPs list: <a href="https://support.office.com/en-gb/article/Office-365-URLs-and-IP-address-ranges-8548a211-3fe7-47cb-abb1-355ea5aa88a2?ui=en-US&rs=en-GB&ad=GB#bkmk_identity" rel="ugc">https://support.office.com/en-gb/article/Office-365-URLs-and-IP-address-ranges-8548a211-3fe7-47cb-abb1-355ea5aa88a2?ui=en-US&rs=en-GB&ad=GB#bkmk_identity</a>
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Did you check the official documentation? https://docs.microsoft.com/en-us/azure/active-directory/connect/active-directory-aadconnect-ports [https://docs.microsoft.com/en-us/azure/active-directory/connect/active-directory-aadconnect-ports]

Also refer to the O365 URLs and IPs list: https://support.office.com/en-gb/article/Office-365-URLs-and-IP-address-ranges-8548a211-3fe7-47cb-abb1-355ea5aa88a2?ui=en-US&rs=en-GB&ad=GB#bkmk_identity [https://support.office.com/en-gb/article/Office-365-URLs-and-IP-address-ranges-8548a211-3fe7-47cb-abb1-355ea5aa88a2?ui=en-US&rs=en-GB&ad=GB#bkmk_identity]

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Hi Manikandan. These are the ports which are required to be opened.<br />
<br />
Service &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Protocol &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Port<br />
LDAP &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;TCP/UDP &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;389<br />
Kerberos &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;TCP/UDP &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;88<br />
DNS &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;TCP/UDP &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;53<br />
Kerberos Change Password &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;TCP/UDP &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;464<br />
RPC &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;TCP &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;135<br />
RPC randomly allocatted high TCP ports &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;TCP &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;1024-64435 / 49152-65535<br />
SMB &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;TCP &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;445<br />
SSL &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;TCP &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;443<br />
SQL &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;TCP &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;1433
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Hi Manikandan. These are the ports which are required to be opened.

Service      Protocol      Port
LDAP      TCP/UDP      389
Kerberos      TCP/UDP      88
DNS      TCP/UDP      53
Kerberos Change Password      TCP/UDP      464
RPC      TCP      135
RPC randomly allocatted high TCP ports      TCP      1024-64435 / 49152-65535
SMB      TCP      445
SSL      TCP      443
SQL      TCP      1433

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We are planning to integrate our on-premises AD with office365 which is hosted on AWS. Currently we don't have on-premises exchange. Hence I need to know which ports must be opened on the AWS network for dirsync to communicate with office365.<br />
<br />
Thanks<br />
Manikandan
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We are planning to integrate our on-premises AD with office365 which is hosted on AWS. Currently we don't have on-premises exchange. Hence I need to know which ports must be opened on the AWS network for dirsync to communicate with office365.

Thanks
Manikandan

Dirsync port requirements with Office365

Exchange is the server side of a collaborative application product that is part of the Microsoft Server infrastructure. Exchange's major features include email, calendaring, contacts and tasks, support for mobile and web-based access to information, and support for data storage.

Exchange

Office 365 is a group of software plus services subscriptions that provides productivity software and related services to its subscribers. Office 365 allows the use of Microsoft Office apps on Windows and OS X, provides storage space on Microsoft's cloud storage service OneDrive, and grants 60 Skype minutes per month. Office 365 includes e-mail and social networking services through hosted versions of Exchange Server, Skype for Business Server, SharePoint and Office Online, integration with Yammer, as well as access to the Office software. All of Office 365's components can be managed and configured through an online portal; users can be added manually, imported from a CSV file, or Office 365 can be set up for single sign-on with a local Active Directory using Active Directory Federation Services.

Microsoft 365

Networking is the process of connecting computing devices, peripherals and terminals together through a system that uses wiring, cabling or radio waves that enable their users to communicate, share information and interact over distances. Often associated are issues regarding operating systems, hardware and equipment, cloud and virtual networking, protocols, architecture, storage and management.

Networking

Amazon Web Services (AWS), is a collection of remote computing services, also called web services, that make up a cloud-computing platform  operated from 11 geographical regions across the world. The most central and well-known of these services include Amazon Elastic Compute Cloud, also known as "EC2", and Amazon Simple Storage Service, also known as "S3". Other services include Elastic MapReduce (EMR), Route 53 (a DNS web service),  provides a highly available and scalable Domain Name System (DNS) web service, Virtual Private Cloud (VPC), storage, database, deployment and application services.