Choose a combined view, one-way availability copies or a two-way Mirror between Microsoft accounts. Check access, privacy and the actual result.
Quick answer: Seeing two Outlook calendars in one app and keeping copies in both accounts are different jobs. Use a combined view when you only need to check both calendars yourself. To put commitments into the calendar colleagues schedule against, choose a permitted one-way copy or a two-way Mirror between writable calendars.
| Your need | Suitable starting point | What to check |
|---|---|---|
| See both calendars while planning | Add the permitted accounts or shared calendars to Outlook | The app view does not prove that each mailbox contains copies |
| Let work availability include one personal account | Outlook on the web's personal-calendar option, if available | Only the personal account's primary calendar contributes |
| Put personal appointments on work without work events going back | A personal-to-work Push | Omit private fields and check actual Free/Busy status |
| Put original events from either account on the other | One two-calendar Mirror | Both selected calendars need write access |
| Collect several client calendars into one place | Several sources in one Push | The source calendars do not receive each other's events |
For a combined view, Microsoft explains working with multiple calendars in Outlook on the web. That view does not create an event copy in another mailbox.
Microsoft documents adding a personal account to work availability. That option connects one personal Google or Outlook.com account, includes its primary-calendar availability, and presents personal events without title or location in the Scheduling Assistant. It is not a general method for mirroring two company mailboxes. Check whether your account and employer permit it.
Open each account's calendar in Outlook first. A work identity that can sign in but has no usable Exchange mailbox may have no calendars to connect. The accounts can be personal and work, or two permitted work accounts; each organization controls its own consent policy.
If you see “Need admin approval”, ask that organization's administrator to review the workspace access instructions. Connecting a personal intermediary or switching the sync direction does not grant access to the restricted mailbox.
For a colleague's calendar, confirm the calendar-level access separately. Being able to view it in Outlook does not prove you can write to it. Use the shared-calendar guide linked below.
Open Accounts in the dashboard and connect the first Microsoft account, then the second. Check the identity on each Microsoft consent screen. If Microsoft keeps choosing the first account, sign out of it or use a private browser window before connecting the next one.
The SYNCDATE login is separate from these calendar connections. Keep both connected accounts under the same SYNCDATE login for this arrangement.
For copies in both accounts, create one sync, select Mirror, and add one writable calendar from each Microsoft account. Review direction, appearance, filters and date window before starting. A Mirror copies originals from either calendar to the other; it does not require a separate reverse sync.
For a one-way personal-to-work arrangement, start with the personal-to-work recipe. Its masked titles, omitted descriptions, locations and guests are a starting configuration you still need to review. It preserves source availability: a Free original remains Free, even if the copy is titled Busy.
The Google–Outlook recipe is for a Google/Microsoft pair. For two Microsoft accounts, choose the calendars in the composer rather than treating a provider-specific preset as an Outlook-only setup.
Title and Free or busy are separate settings. Pick Busy under Title to mask the event name. Pick Same as original to retain the original availability, or Always busy when every eligible copied event must block time. Leave descriptions, locations and guests out if those details should not enter the other account.
For different appearance in each destination, review appearance for each destination and their Pro requirement. A Private flag is not the same as omitting information: do not copy a confidential title and assume the flag prevents every administrator from accessing it.
Free covers two accounts, two calendars and one sync with a 30-day forward window. Existing usage counts toward those limits. More accounts or calendars, a longer window, or per-calendar appearance can require a paid plan. Check current prices for the arrangement you need.
Use empty test calendars where possible. Starting a sync can copy existing eligible events; review access and appearance first.
There is a delay between a change and its arrival in another system. Provider notifications, processing, limits and retries prevent an instant-delivery guarantee. Verify the outcome you need before relying on it for a critical slot.
Check the account identities, selected calendars, write permissions, direction, filters and date window. If another sync service already writes to this pair, review its cleanup policy and stop the old writer before switching production calendars. Running both on the same pair can create duplicates.
For three or more company accounts, choose one supported multi-calendar Mirror or a one-way collection into a hub. Separate syncs do not relay their copies through an intermediary calendar. Read supported limits before extending the arrangement.
If the observed copy differs from your settings, contact support with the sync ID, event time and observed difference. Keep credentials, secret calendar URLs and unnecessary event details out of the message.
Verified against the product on .
Still stuck? Support will read your actual setup and tell you what it sees — describe what you expected and what you got.