Cannot start Microsoft Office Outlook

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Cannot start Microsoft Office Outlook with following errors

Outlook could not log on. Check to make sure you are connected to the network and are using the proper server and mailbox name.

The action could not be completed. The connection to the Microsoft Exchange Server is unavailable. Outlook must be online or connected to complete this action.

The connection to the Microsoft Exchange Server is unavailable. Outlook must be online or connected to complete this action.

The Microsoft Exchange Server computer is not available. Either there are network problems or the Microsoft Exchange Server computer is down for maintenance.

The name could not be resolved. The connection to the Microsoft Exchange Server is unavailable. Outlook must be online or connected to complete this action.

The set of folders could not be opened.

The server is not available

Unable to open your default e-mail folders. The information store could not be opened.

Unable to open Outlook window.

You must connect to your Microsoft Exchange Server computer with the current profile before you can synchronize your folders with your offline folder file.

Your Server or Mailbox names could not be resolved.

Case 1: The Microsoft Exchange Information Store is not running. Restarting it fixed the problem.

Case 2: There is no network connectivity to server SERVER.chicagotechnet.local.

Case 3: You do not have sufficient permissions to perform this command. The following permissions are required to perform this command: Exchange View-Only Administrator and local administrators group for the target server.

Case 4: Credentials have been cached for an unpriviledged user. Try removing the entry for this server from Stored User Names and Passwords.

get-PublicFolderDatabase
Completed

Case 5: This problem occurs because the default Exchange 2010 configuration requires RPC encryption. However, by default, Microsoft Office Outlook 2003 does not use RPC encryption. To disable the required encryption between Outlook and Exchange, follow these steps:
1. On the server that is running Exchange 2010, run the following command in the Exchange Management Shell:

Set-RpcClientAccess –Server Exchange_server_name –EncryptionRequired $False

Note The Exchange_server_name placeholder represents the name of an Exchange Server 2010-based server that has the Client Access Server role.

You must run this cmdlet for all Exchange 2010 Client Access servers.
2. Rerun this command for each Exchange 2010-based server that has the Client Access Server role.
3. After your Outlook clients are updated with the setting to enable encrypted RPC communication with Exchange (see steps provided below), you can re-enable the RPC encryption requirement on your Exchange 2010 servers that have the Client Access Server role.

To re-enable the RPC encryption requirement on your Exchange 2010-based servers that have the Client Access Server role, run the following command in the Exchange Management Shell:
Set-RpcClientAccess –Server Exchange_server_name –EncryptionRequired $True

Note The Exchange_server_name placeholder represents the name of an Exchange 2010-based server that has the Client Access Server role.

This cmdlet must be run for all Exchange 2010 Client Access servers.

Case 3: you are using Microsoft Office Outlook 2007 and you disable the Encrypt data between Microsoft Office Outlook and Microsoft Exchange profile setting. To manually update an existing Outlook 2007 profile so that it uses RPC encryption with Exchange 2010, follow these steps:
1. In Control Panel, open the Mail item.

2. Click Show Profiles.

3. Select your profile, and then click Properties.

4. Click E-mail Accounts.

5. Select the Microsoft Exchange Server account, and then click Change.

6. In the dialog box that contains your mailbox server and user name, click More Settings.

7. In the Microsoft Exchange dialog box, click the Security tab.

8. Click to select the Encrypt data between Microsoft Office Outlook and Microsoft Exchange check box, and then click OK.

9. Click Next, and then click Finish.

10. Click Close, click Close, and then click OK.

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