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Office 365 Tenant-to-Tenant Migration: How to Keep GAL and Company Contacts Synced
Moving users to a new Microsoft 365 tenant is more than a mailbox project. IT teams also need to account for how employees find colleagues, access shared business contacts, and identify incoming calls on their smartphones. A successful mailbox move does not...
Exchange ActiveSync vs CardDAV for Microsoft 365 Contacts: Which Should Enterprise IT Teams Use in 2026?
For Microsoft 365 organizations, the choice between Exchange ActiveSync and CardDAV depends on where contacts are stored, how devices are managed, and who needs access to them. Exchange ActiveSync synchronizes supported mailbox data, including personal contacts, with...
Microsoft 365 Contact Sync for Mergers and Acquisitions: Unifying GALs Across Multiple Tenants
After a merger or acquisition, organizations often operate multiple Microsoft 365 tenants while integrating their people, systems and directories. During this coexistence period, employees need to find colleagues across company boundaries, even when their accounts...
Microsoft 365 Contact Sync for Financial Services: One Accurate Directory Across Every Office and Tenant
Every financial institution has had a day when the directory lets someone down. A relationship manager dials a number that was reassigned last quarter. A deal team spends the first week of an integration asking who sits where. An analyst cannot find the new compliance...
CiraSync vs iTrezzo: GAL & Contact Sync Tools Compared (2026)
If you are comparing CiraSync vs iTrezzo in 2026, there is something important to know before comparing feature lists: iTrezzo Unified Contact Management is now CiraSync On-Prem. The iTrezzo product release history records the rebrand to CiraSync On-Premise in...
GAL Sync The Complete Guide to Syncing the Global Address List to Smartphones (2026)
Your Microsoft 365 Global Address List may contain the phone numbers, email addresses, job titles, and other directory information employees need every day. The problem is that having someone in the GAL does not automatically make that person a saved contact in an...
How to Add a Shared Mailbox in Outlook on Any Device: Desktop, Web, iPhone, and Android (2026 Guide)
TL;DR: Before you can use a shared mailbox, your Microsoft 365 administrator must create it and give you the required permissions. In classic Outlook for Windows, Full Access assigned directly to an individual can use automapping to add the mailbox automatically....
Outlook Not Syncing? The Complete Fix-It Guide: Calendar and Contacts on iPhone, Android, Web, and Desktop
You add an event on your laptop, glance at your phone an hour later, and it isn’t there. Or a coworker’s number lives in Outlook but never shows up when they call your cell. Sometimes it’s the reverse: everything worked fine for months, then one...
