This article have all the important links you need to administer Office 365

Office 365 PowerShell modules

Link Remarks
Azure Active Directory PowerShell V1 module page Deprecated, installed using PowerShell
SharePoint Online Management Shell
Teams Powershell module

Directory Synchronization

Link Remarks
IdFix Directory Synchronization Error Remediation Tool
Azure AD Connect 2.x Microsoft Azure Active Directory Connect (current)
Authentication Agent Pass-through authentication (PTA) agent
AAD Cloud provisioning Agent AAD Cloud provisioning Agent

Office 365 product information

Link Remarks
Office 365 Service Descriptions
Office 365 Roadmap
Office Products english
Office Blogs
Azure geographies

Office 365 trials

Link Remarks
Office 365 Business Office applications and OneDrive for organisations < 300 users
Office 365 Business Premium Office applications and online services for organisations < 300 users
Office 365 Enterprise E3 Office applications and online services without user limitations
Office 365 Enterprise E5 All features of E3 plus advanced security, analytics, and voice capabilities
Microsoft Teams (free) Free version of Microsoft Teams for up to 300 users

Office 365 administration and troubleshooting

Link Remarks
Exchange Remote Connectivity Analyzer Tools to test your DNS configuration, services, etc. outside your organisation
Exchange Deployment Assistant Helps to deploy Exchange depending on your choice (on-prem, hybrid, cloud only)
SharePoint Timezone IDs SharePoint Time Zone ID values
SharePoint Locale IDs Microsoft Locale ID values Get a free custom domain for Office 365 / Azure AD

Office 365 ProPlus deployment

Link Remarks
Deploying Office 365 ProPlus Documentation for deploying Office 365 ProPlus from a local source
Office Deployment Tool Command-line tool that you can use to download and deploy Click-to-Run versions of Office, such as Microsoft 365 Apps for enterprise, to your client computers.
Office 365 ProPlus configuration editor Editor to build XML configuration files for Office 365 ProPlus deployment
Retired! Use Office Customization Tool for Click-to-Run below.
Office Customization Tool for Click-to-Run
Dr Nestori Syynimaa (@DrAzureAD) avatar
About Dr Nestori Syynimaa (@DrAzureAD)
Dr Syynimaa works as Senior Principal Information Security Researcher at Secureworks CTU™ (Counter Threat Unit).
Before moving to his current position, Dr Syynimaa worked as a CIO, consultant, trainer, and university lecturer for over 20 years. He is a regular speaker in scientific and professional conferences related to Microsoft 365 and Azure AD security.

Dr Syynimaa is Microsoft Certified Expert (Microsoft 365), Microsoft Certified Azure Solutions Architect Expert, Microsoft Certified Trainer, Microsoft MVP (Enterprise Mobility, Identity and Access), and Microsoft Most Valuable Security Researcher (MVR).