- "Lync cannot verify that the server is trusted for your sign-in address" message when you sign in to Lync 2010 by authenticating to Lync Online
This dialog box is a "Trust Model Dialog" box. It is displayed when you are connecting to a server that is unknown to Lync. Lync must have your permission to verify whether to trust this ser … - Error message when an Office 365 user tries to sign in to Lync Online: "There was a problem acquiring a personal certificate required to sign in"
This Microsoft Knowledge Base article can help troubleshoot the error "Cannot sign in to Lync." - How to troubleshoot authentication and connectivity issues in Lync Online
This article discusses how to troubleshoot issues that may occur when you use Microsoft Lync Online in a Microsoft Office 365 environment. - You get connection errors and Outlook integration errors in Lync Online
When you install Microsoft Lync 2010 on a computer that is running Microsoft Outlook for use in a Microsoft Office 365 environment, you receive one or more of the following error messages: "There … - Exchange ActiveSync client connectivity in Office 365
Check out this article on the EHLO blog that explains how mobile devices connect to Exchange Online (Office 365) service and how the connectivity may be impacted if the device does not support certain … - PDF Files in SharePoint Online
A new update allows you to open PDF files directly in Adobe Reader and the PDF file will remain connected to SharePoint Online. - Troubleshooting Office 365 using the Remote Connectivity Analyzer
Useful troubleshooting radio broadcast - Error message when you run Office 365 Desktop Setup on a computer on which the 2007 Microsoft Office system SP3 is installed: "This update could not be installed on your computer. Error code: 17031"
This issue occurs because Office 365 Desktop Setup tries to install certain updates that apply to the 2007 Microsoft Office suite Service Pack 2 (SP2). However, these updates are already installed on … - Error message when you run Office 365 Desktop Setup: "Application cannot be started. Contact the application vendor"
To resolve this issue, clear the ClickOnce application cache. To do this, follow the steps in this article. - Ensuring Your Network Works With Lync Online
A guide to setting Up your Lync Online networking environment. - How to troubleshoot authentication and connectivity issues in Lync Online
This article discusses how to troubleshoot issues that may occur when you use Microsoft Lync Online in a Microsoft Office 365 environment. - Microsoft Office 365 Deployment Readiness Tool
The Office 365 Deployment Readiness Tool provides analysis of your on-premises environment in preparation for an Office 365 enterprise deployment. - Prepare for single sign-on
The Office 365 Deployment Readiness Tool provides analysis of your on-premises environment in preparation for an Office 365 enterprise deployment. - "The computer must be joined to a domain" error message occurs when you try to install Microsoft Online Services Directory Synchronization Tool
The Office 365 Deployment Readiness Tool provides analysis of your on-premises environment in preparation for an Office 365 enterprise deployment. - How to reset a user's password
The Office 365 Deployment Readiness Tool provides analysis of your on-premises environment in preparation for an Office 365 enterprise deployment. - Troubleshooting guide for the Microsoft Online Portal
The Office 365 Deployment Readiness Tool provides analysis of your on-premises environment in preparation for an Office 365 enterprise deployment. - Microsoft Lync 2010 continuously asks for credentials after signing in
The Office 365 Deployment Readiness Tool provides analysis of your on-premises environment in preparation for an Office 365 enterprise deployment. - How to troubleshoot Microsoft Lync Online and Outlook integration issues
The Office 365 Deployment Readiness Tool provides analysis of your on-premises environment in preparation for an Office 365 enterprise deployment. - Error message when you try to sign in to the Microsoft Online Portal as a federated user
The Office 365 Deployment Readiness Tool provides analysis of your on-premises environment in preparation for an Office 365 enterprise deployment. - Error 016: Synchronization has been stopped
How to request a Directory Service quota increase in Office 365 when you receive the "This company has exceeded the number of objects that can be synchronized" error message - Checking SharePoint Online permissions for a person or site
How to request a Directory Service quota increase in Office 365 when you receive the "This company has exceeded the number of objects that can be synchronized" error message - Exchange Server Deployment Assistant Update for Exchange 2007 and Office 365 Coexistence
How to request a Directory Service quota increase in Office 365 when you receive the "This company has exceeded the number of objects that can be synchronized" error message - Troubleshooting Microsoft Lync Online instant messaging and presence issues
How to request a Directory Service quota increase in Office 365 when you receive the "This company has exceeded the number of objects that can be synchronized" error message - Troubleshoot authentication and connectivity issues in Lync Online
How to request a Directory Service quota increase in Office 365 when you receive the "This company has exceeded the number of objects that can be synchronized" error message - Compare features across the delivery models for Lync Server 2010 (on-premises), Lync Online, and Office Communications Online ("OC Online").
This web site can help you decide which delivery model has the features your organization requires. - The participants in a conversation cannot connect to the desktop-sharing session in Lync Online
This web site can help you decide which delivery model has the features your organization requires. - You cannot add or connect to a Federated contact in Microsoft Lync Online
This web site can help you decide which delivery model has the features your organization requires. - You cannot connect to Lync Online, or certain features do not work, because an on-premises firewall blocks the connection
This web site can help you decide which delivery model has the features your organization requires.