For interim & fractional executives
Multiple engagements, one calendar – zero collisions
Every engagement means a separate account in the client's tenant – and a calendar that knows nothing about the others. Kalender Sync keeps all engagement calendars and your own in real-time sync (from the Basic plan). Each client only sees "busy" from the rest.
A mandate usually means an account inside the client's tenant, and that calendar knows nothing about your other mandates. That is exactly where the collisions that cost you money come from. Kalender Sync connects each mandate calendar to your own individually, so you hold the complete picture while every client sees only what you release. When a mandate ends, you disconnect and the syncing stops.
Calendar sync for interim & fractional executives
How Kalender Sync helps across all your engagements
No double-booking between engagements
Whether you run two, three or four engagements in parallel – Microsoft 365 here, Google Workspace there: all accounts come together in real time – on the Basic and Professional plans. A meeting at client A automatically blocks the slot everywhere. At four-figure day rates, every collision is direct revenue and reputation damage – which you can now avoid entirely.
A non-issue in compliance checks
Built in Munich, hosted in Germany, GDPR-compliant, with a DPA for Professional customers. When your client's IT team or data protection officer asks questions, you already have the answers.
Discretion is built in
Client A never learns who else you work for. Per sync, you decide what comes through: "busy" only, title + time, or full details. Add a custom display name like "External" – and that's all anyone sees.
Cleanly handled from day one to the last day of the engagement
No account in the client's tenant? A shared calendar link via iCal feed is all it takes (included from Basic up). And when the engagement ends, you delete the connection – the sync stops immediately, with no open access and nothing left behind.
FAQ
Frequently asked questions
Does my client need admin rights or a software installation?
In most cases neither. The connection runs over the official Microsoft Graph API or the Google API via OAuth, with no add-in and no extension. Only tenants with a strict consent policy require a one-off admin consent, which is a single click for IT rather than an installation.
I get no account in the client tenant at all. Is there a way in?
Yes, if someone shares a calendar as an iCal feed. Kalender Sync connects that read-only, included in the Professional plan. You then see the mandate's appointments in your own calendar, though you cannot write into that feed.
Can client A see who else I work for?
No, unless you enable it. By default only the fact that you are busy travels. Titles, attendees and notes stay out, and the blocked time can carry a label of your own that gives away nothing about another mandate.
What happens when a mandate ends?
You disconnect it in your account. From that moment nothing is synced any more, in either direction. The client's calendar stays in their system, yours stays in yours.
Several mandates in parallel, two of them on Microsoft 365. Is that a problem?
No, multiple accounts with the same provider are the normal case. Only the total is capped: two calendar accounts on Free, three on Basic, unlimited on Professional. Each account is its own connection with its own direction and visibility, and the two-way sync from Basic makes sure an appointment in one mandate shows up as busy in all the others straight away.
Ready to run your engagements without scheduling risk?
Try free for 7 daysCurrently supported providers
GoogleMicrosoftApple iCloudKSuiteGMXWEB.DEmailbox.orgiCal-Feeds
