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Office 365 DirSync Requirents

Posted on February 23, 2021 By rich No Comments on Office 365 DirSync Requirents

Domain & Forest Requirements

  • SQL Server – By default SQL Server Express will be installed, which is limited to 10GB databases. (Around 50,000 objects). If you expect to have more that 50,000 objects you should plan for a FULL version of SQL server. The account used to set up dirsync will need full SQL server permissions and the dirsync database will require “public permissions”.
  • Forefront Identity Manager 2010 R2 (THIS IS NOT ACTUALLY REQUIRED FOR SINGLE FORESTS)
  • Dirsync server must be in same domain and same forest
  • Recommended to install Dirsync on a member server, but on the DC will work OK
  • Windows Server 2003 Forest Functional Mode or higher
  • The lowest level DC must be at least Server 2003 SP1 32bit
Server Prerequisites
.NET Framework 3.1 SP1 & 4.0
Windows Azure AD Module for Power-Shell
Operating System Prerequisites
DirSync Server must be installed on a server with Server 2008 R2 SP1 Standard as a minimum

Accounts
O365 Admin account with full tenant account rights
Active Directory account with “Enterprise Admin” rights.
Hardware Requirements
50,000 Objects or less:
1.6GHz, 4GB RAM, 70GB Disk
100,000 Objects or less:
16GB RAM, 100GB Disk
300,000 Objects or less:
32GB RAM, 300GB Disk
Ports

These ports are required in addition to the default ports required for Office 365.
See default ports here
TCP/UDP
389 – LDAP
88 – Kerberos & 464 – Kerberos (Password Changes) 
53 – DNS
TCP
135 – RPC
445 – SMB
1433 – SQL
TCP Randomly allocated 1024-65535

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