Keep Every Directory in Your Organization Connected, Clean, and Always Up to Date

Modern organizations don’t run on a single directory anymore. You’re managing multiple tenants, subsidiaries, business units, or partner environments, each with its own contacts, mailboxes, and distribution lists. When those directories drift out of sync, communication slows, teams lose visibility, and IT spends hours manually updating records.

CiraSync eliminates that complexity with automated, secure, and scalable directory‑to‑directory synchronization.

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Why Directory‑to‑Directory Sync Matters

When directories fall out of sync, the impact is immediate:

Outdated contact info leads to missed calls and delayed responses
Teams lose visibility into who’s who across departments or tenants
IT wastes hours manually updating records
M&A integrations stall due to mismatched directory structures
Our Products

CiraSync Cloud

Effortless enterprise-grade one-way syncing of Contacts & Calendars across unlimited users, hosted on the Azure cloud

CiraSync On-Premise

All the benefits of CiraSync Cloud, hosted directly on-premises for high security environments

CiraSync Hub

Two-way syncing of Contacts & Calendars, not only across Microsoft environments but across Google, Hubspot, and many other CRM platforms

One Platform. Every Directory. Synced.

Whether you need one‑way updates or full two‑way synchronization, CiraSync gives you the control, automation, and reliability your organization needs to stay connected.

No more manual updates. No more outdated contacts. Just clean, consistent directories.

CiraSync Cloud

CiraSync keeps your directories aligned by pushing updates from a single source of truth to any connected directory, at-scale and automatically.

Perfect For:

  • Organizations with a primary Microsoft 365 tenant feeding multiple downstream directories
  • Keeping shared mailboxes, GALs, and distribution lists consistent across environments
  • Ensuring frontline and mobile teams always see accurate contact information

Key Benefits:

  • Automated one‑way sync from master directory to secondary directories
  • Zero-touch updates.
  • Enterprise-grade security and Azure-based infrastructure
CiraSync On-Premise

CiraSync On‑Premise keeps your directories aligned by pushing updates from a single source of truth to connected directories and devices—entirely within your own environment.

Perfect For:

  • Organizations with a primary on‑prem or Microsoft 365 directory feeding downstream directories or users
  • Keeping shared mailboxes, GALs, and distribution lists consistent in high‑security environments
  • Ensuring frontline and mobile teams always see accurate contact information—without cloud dependency

Key Benefits:

  • Automated one‑way sync from master directory to secondary directories and devices
  • Zero‑touch updates with no end‑user action required
  • Fully on‑premise deployment with no data leaving your network
  • Enterprise‑grade security designed for regulated and air‑gapped environments
CiraSync Hub

When you need directories to stay perfectly aligned, CiraHub delivers full two‑way sync across tenants, platforms, and environments.
Ideal For:

  • Multi‑tenant organizations
  • Mergers and acquisitions
  • MSPs managing multiple client directories
  • Cross‑functional teams that rely on shared, accurate contact data

Key Benefits:

  • Bi-directional sync between any number of directories
  • Automatic conflict resolution and field‑level mapping
  • Sync GALs, shared mailboxes, public folders, and more
  • Works across Microsoft 365 tenants and hybrid environments
Enterprise Ready

Security You Can Trust

Built for the most demanding enterprise environments. Your data stays protected with industry-leading security practices.

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Ready to Sync Smarter?

Join 3,000+ enterprises that trust CiraSync for seamless contact and calendar synchronization.

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Common Questions IT Teams Ask When Syncing Contacts & Calendars Between Directories

What is directory‑to‑directory sync in Microsoft environments?
Directory‑to‑directory sync is the process of automatically keeping contact and calendar data aligned between two or more directories, such as Microsoft 365 tenants, Exchange environments, or hybrid directory setups. CiraSync enables directory‑to‑directory syncing so updates made in one directory are reflected in another without manual exports or reconciliation.
When do organizations need directory‑to‑directory syncing?
Organizations typically need directory‑to‑directory syncing during mergers, acquisitions, tenant consolidations, or hybrid Microsoft 365 and Exchange deployments. CiraSync helps IT teams keep contacts and shared calendars consistent across directories during these transitions, reducing disruption and avoiding duplicate or outdated data.
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