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Bulk Import External Contacts into Microsoft 365 GAL
Bulk importing external contacts into Microsoft 365 comes down to two things: Exchange Online PowerShell and a CSV file. The cmdlets create mail contacts, fill in their details, and put them in the Global Address List (GAL), so your team can find suppliers, partners,...
After an Exchange or Microsoft 365 Migration: Why Company Contacts Do Not Appear on Employee Phones
Company contacts usually disappear from phones after an Exchange or Microsoft 365 migration for one of three reasons: the phone is still connected to the old mailbox, the contacts never lived in the mailbox in the first place, or the tool that used to deliver them was...
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...
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... 
