Kolleno

The two ways Kolleno can connect to a Microsoft 365 mailbox, what each one needs, what breaks each one, and how to pick between them.

Personal mailbox or RBAC application access: choosing how to connect Microsoft 365

The PowerShell steps to scope Kolleno's access to a single mailbox using Exchange RBAC for Applications, so it cannot reach any other mailbox in your tenant.

For IT admins: giving Kolleno access to one shared mailbox (Microsoft 365)

Microsoft is switching off Exchange Web Services on 1 October 2026. Mailboxes connected to Kolleno before 3 August 2026 need to be disconnected and reconnected once to move onto Microsoft…

Action needed: reconnect Microsoft 365 mailboxes connected before 3 August 2026

Get your admin to approve the Kolleno app in your Microsoft tenant.

Microsoft 365: admin approval

Reconnect your Gmail to Kolleno for sending and receiving emails.

Reconnecting Your Microsoft 365 Mailbox

How to connect and manage your Microsoft 365 mailboxes

Microsoft 365 Mailboxes

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Because you already asked about invitations, this prototype demo can add the follow-up: use the role selector before sending each invite to limit access to the teammate responsibilities.

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This prototype demo suggests starting with your workspace profile, inviting the team members who need access, and then connecting the integrations you use.

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In this prototype demo, integrations are configured from workspace settings. Choose the integration, connect the account, and review the enabled permissions.

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In this prototype demo, invite teammates from workspace settings, then choose the access each teammate needs before sending the invitation.

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