May 18, 2020 If the Work Offline button has not been toggled ON, you should just see a normal button. Make sure the button is not greyed out and then if it was, toggle the “Work Offline” button OFF and restart outlook (if needed). This will get your Outlook out of the offline mode and back to online. Sep 27, 2013  This vidoe shows how to uncheck work offline setting from MS outlook 2011 client. How to Setup an Email Account in Outlook 2016 for Mac. Click the Work Offline button on the Send/Receive tab. The status will change to WORKING OFFLINE. Then click the Work Offline button again to turn it off and prompt Outlook to connect. Click File Options Advanced Send/Receive button and check When Outlook is offline uncheck. (Outlook 2003) If you are working offline, it will look like this: (Outlook 2007) (Outlook 2003) To remedy the problem, click the arrow to the right of “Offline” and uncheck the Work Offline option: If you are still unable to connect to the Exchange server after unchecking Work Offline, it may look like this.

  1. See Full List On
  2. Cached

Cached Exchange Mode is one of the two modes to connect the Outlook application with an Exchange account. The other one is Online Mode. The cached mode has a job of keeping a local copy of the user’s exchange mailbox stored on the hard drive in the form of an OST file. While the Cached mode is enabled in Outlook, the Outlook client will check the OST file for all the information and searches, and another process will constantly update the mail and synchronize it will open the cached file.

The cached Exchange mode provides following benefits to the user –

  1. Apart from primary mailbox, cached mode keeps a copy of Offline Global Address Book (GAL).
  2. A user can make changes in the mailbox like accessing emails and saving drafts even when the Internet is down.
  3. It is useful for high latency connections.
  4. Searching files and information is quite easy in offline storage (OST) files.
  5. In satellite and radio-frequency based connections, OST file works much better than the online files.

Difference between Cached Exchange Mode and Online Mode –

  1. Cached Exchange Mode requires a lot of disk space in comparison to Online Mode.
  2. The number of features in Cached Exchange Mode and Online Mode is different.
  3. An index can be prepared by searching content locally in cached mode.
  4. In Cached Exchange Mode, you cannot perform searching in emails.

Issues You May Face While Working in Cached Exchange Mode


Cached Mode is beneficial when you want to work offline. But while working in the cached mode, multiple issues can occur with Outlook.

Here are some examples:

  • Some of the messages may be stored only in the OST file and will not be available in the Exchange mailbox.
  • Some important information like calendar items will point to the local files rather than the Server files; so it is difficult to share the calendar entries in the cached mode
  • If you enable the cached mode to an existing mailbox that already has large amount of data, that may create downloading issues.
  • The response time for the identification of the corruption issue in the mailbox may take more time.
  • If the OST file that has been created after enabling the Exchange Mode becomes corrupt, then all its data will be lost before connecting with the Exchange Server. Also, if the OST file gets disassociated with the account, then all information saved in it will be lost.

How can I Access the Content From an Inaccessible OST File?

A user cannot open an inaccessible or corrupt OST file. Although the scanPST tool can check for the corruption in the OST file, it is not suitable to retrieve data from inaccessible OST files. In such cases, you need to assistance of professional software. Kernel for OST to PST Converter is specialized software for restoring data from OST files. It can recover the data, provide the preview, filter the recovered data, and save it in multiple formats including the PST file.

How to turn on Cached Exchange Mode in Microsoft Outlook application?

Cached Exchange Mode is perfectly suitable for Exchange Server users. It saves a local copy of your online mailbox to your computer. Follow the simple procedure here –

  1. Follow File>>Account Settings>>Account Settings.
  2. Select the Exchange Account and click Change.
  3. In the Offline Settings, check Use Cached Exchange Mode.
  4. Restart the Outlook application again.

How to turn off Cached Exchange Mode in Microsoft Outlook application?

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If you want to turn off the Cached Exchange Mode, then follow the above-given method and uncheck the Use Cached Exchange Mode.

There is no Cached Exchange Mode in my Microsoft Outlook application –

If there is no Cached Exchange Mode option in your Outlook application, then there can be following reasons behind this scenario –

  1. Microsoft Outlook does not have an Exchange Account –
    If there is not Exchange Account included in the Microsoft Outlook, then there will be no option of Cached Exchange Mode. POP3 and IMAP accounts do not have this feature.
  2. Exchange server administrator has disabled this feature –
    An Exchange Server administrator can easily disable the feature of Cached Exchange Mode.
  3. Microsoft terminal service is installed –
    If the windows computer has Microsoft terminal installed in it, then cached Exchange Mode will not be available also.

How can I verify that Cached Exchange Mode is enabled?

Verifying the status of Cached Exchange Mode is quite easy to check. Look at the bottom of the right-hand side of Outlook application, it should say Connected to Microsoft Exchange, and an OST file is present in the computer. It means that the Cached Exchange Mode is enabled.
If Cached Exchange Mode is not enabled, then it will say Online with Microsoft Exchange.

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How can I access the content from an inaccessible OST file?

A user cannot open an inaccessible file in Outlook application. If you want to recover the content of an OST file, then you should use a professional tool like Kernel for OST to PST which can recover complete OST file data. OST to PST converter is one such tool which can recover a severely corrupt OST file by converting it into PST format which is accessible in Outlook.

Mail User Guide

When an email account is offline, a lightning bolt icon appears at the end of the Favorites bar, just below the search field. The icon also appears next to the account’s mailboxes in the Mail sidebar.

In the Mail app on your Mac, do one of the following:

  • Take all accounts online: Click the lightning bolt icon or choose Mailbox > Take All Accounts Online.

  • Take a specific account online (if you have more than one account): Click the lightning bolt icon next to the account’s mailbox, or choose Mailbox > Online Status > Take [account] Online.


If you can’t take an account online, make sure you’re connected to the internet. If a warning icon appears next to the account name, click it to open Connection Doctor. Learn more about using Connection Doctor.

Some mailbox names can appear dimmed if you don’t have permission to access them, such as public mailboxes on a mail server.

See alsoTake email accounts online or offline in Mail on MacSave draft emails in Mail on MacApple Support article: If you can’t send email on your Mac