Enterprise Client
GALSync Between Microsoft 365 Tenants
Seamless address book synchronization for multi-tenant collaboration
About This Project
Following a strategic partnership between two major organizations, this global enterprise needed to enable seamless collaboration between teams operating on separate Microsoft 365 tenants. With over 10,000 employees across both entities, the ability to easily find and communicate with colleagues regardless of their tenant was critical for day-to-day operations.
Related Resources
Explore our GALSync solutions and documentation
Solution Scope
Global Address List
Complete GAL synchronization across tenants
Contact Information
Employee directories unified and accessible
Automated Sync
Scheduled synchronization without manual intervention
Multi-Tenant Support
Seamless coexistence between organizations
Cross-Tenant Collaboration Barriers
After forming a strategic partnership, employees from both organizations needed to collaborate seamlessly but were unable to find each other in their respective address books.
- Employees unable to find colleagues in the other organization's address book
- Manual contact management causing outdated information
- No native Microsoft solution for cross-tenant GAL synchronization
- Need for automated, ongoing synchronization as employees join or leave
- Maintaining accurate contact details across multiple tenants
Key Highlights
Multi-Tenant Collaboration
Enabled seamless collaboration between two major organizations operating on separate Microsoft 365 tenants following a strategic partnership.
Scheduled Synchronization
Automated GAL synchronization keeps all contact directories up-to-date without manual intervention, ensuring employees always have current information.
No Installation Required
Cloud-based solution configured entirely through web browser, deployed in just one day with simulation mode for safe testing.
Cloudiway GALSync
Cloudiway's GALSync solution provided automated address book synchronization between the Microsoft 365 tenants, enabling seamless collaboration without manual maintenance.
- Cloudiway GALSync SaaS solution requiring no on-premises installation
- Automated scheduled synchronization keeping directories up-to-date
- Simulation mode to preview changes before pushing to production
- Support for Microsoft 365 tenants, Exchange On-premises, and Google Workspace
- Web-based configuration accessible from any browser
Seamless Cross-Tenant Collaboration
Seamless cross-tenant collaboration
Synchronized in first week
Quick configuration and deployment
Automated daily updates
Frequently Asked Questions
Common questions about this GALSync project
What is GALSync and why is it needed between Microsoft 365 tenants?
GALSync (Global Address List Synchronization) enables employees in one Microsoft 365 tenant to find and communicate with colleagues in another tenant. This is essential after mergers, acquisitions, or partnerships where organizations need to collaborate but maintain separate tenants. Microsoft doesn't provide native cross-tenant GAL synchronization.
How does Cloudiway GALSync work between multiple tenants?
Cloudiway GALSync is a SaaS solution that automatically synchronizes contact information between Microsoft 365 tenants, Exchange On-premises servers, or Google Workspace. It runs on a configurable schedule, updating directories without manual intervention. A simulation mode allows previewing changes before pushing to production.
How long does it take to set up GALSync between two Microsoft 365 tenants?
One day is generally sufficient to set up GALSync between two Microsoft 365 tenants. The configuration is done entirely online through a web browser with no on-premises installation required. Additional time may be needed for environments with more than two tenants.
Can GALSync work with hybrid environments?
Yes, Cloudiway GALSync supports any combination of Microsoft 365 tenants, Exchange On-premises (2007 or later), and Google Workspace for Business. This flexibility makes it ideal for organizations with mixed environments during transitions or ongoing coexistence scenarios.
What happens when employees join or leave during GALSync synchronization?
Cloudiway GALSync automatically handles employee changes through scheduled synchronization. New employees are added to the synchronized directories, and departed employees are removed, ensuring all address books remain current without manual updates.
Need Cross-Tenant Collaboration?
Enable seamless address book synchronization between your Microsoft 365 tenants with Cloudiway GALSync.