Resolving Outlook OST accessibility issues owing to RPC Connectivity

Microsoft Exchange Server creates OST files in the cached mode that are the exact replicas of server mailboxes but are stored on a user's local computer. These OST files need to synchronize with the Exchange Server in order to reflect all the work done in the offline mode on the actual server mailboxes. Sometimes when the OST file is tried to be accessed it returns the following error message:

“The name could not be resolved. The Microsoft Exchange address book was unable to logon to the Microsoft Exchange Server computer.”

Root of the problem:

The aforestated error is the result of one or more missing/corrupt RPC registry entries. RPCs (Remote Procedure Call) protocol registry keys are deployed by Microsoft Outlook to make calls to the network. RPCs permit users to send calls to many different protocol stacks, the most common one being TCP/IP. If one or more of these registry keys are missing, Outlook fails to establish a connection with the Exchange Server. Moreover, in the absence of required RPC entries Exchange Services are not registered to respond to client requests.

Resolve:

To identify and troubleshoot the RPC issues RPC Dump can be used. The three most essential RPC components required by Outlook to connect successfully are:

1.The endpoint mapper
2.Exchange Information Store service with the Universal Unique Identifier (UUID) of a4f1db00-ca47-1067-b31e-00dd010662da.
3.The Name Service Provider Interface (NSPI) with the UUID of f5cc5a18-4264-101a-8c59-08002b2f8426.

RPC Dump should be run through the following command prompts:

rpcdump.exe /i > rpcdump.txt
rpcdump.exe /p > rpcdump.txt


In order to restore the missing RPC registry values follow these steps:

1.Verify registry entries
2.Verify the version of the DLL file
3.Remove and reinstall TCP/IP

If this is still not able to resolve the issue, then the OST file has become corrupt and needs to be recovered by OST to PST Conversion. Myriad OST errors are encountered owing to corrupt or orphaned Outlook OST files. The only way for efficacious Outlook OST Recovery is through reliable third party tools. One such sought after tool is “Stellar Phoenix OST to PST Converter”.

Stellar is a leading name in the world of data recovery and this powerful utility can recover all the Outlook OST file data into an importable PST file for MS Outlook 2010, 2007, 2003, 2002 and 2000. The demo version of the software is available for free download and offers a clear preview of the recoverable items in a three view structure. This is an adroit tool that can recover vital user mailbox data by successful conversion from OST to PST.

It is feasible to recover data from a corrupt or damaged Outlook OST file

MS Exchange provides users an option to work offline and access their mailbox data even in the absence of a connection using the ‘Cached Exchange’ mode. These changes are automatically synchronized when a connection is made to the Exchange server. If Outlook synchronization with the Exchange server fails, you may lose all the valuable piece of work that was done offline. As a consequence, you could face serious data loss. This usually happens when your Outlook offline folders (.ost) file is damaged. An OST integrity check tool can be used for repairing the corrupt OST file. However, if the problem persists, you can easily convert your OST to PST using a reliable third-party utility.

For instance, you use MS Outlook 2002. When you try to synchronize your OST file (that has crossed the size limitation of 1.82 GB) with the Exchange Server, you may receive the following error message on your screen:

''Task ‘Microsoft Exchange Server’ reported error (0x00040820): Errors in background synchronization. In most cases, further information is available in a synchronization log in the Deleted items folder. ''

Deleted Items folder of Exchange Server mailbox and OST file do not show the synchronization log.

Why an error is occurring?

Above error message is caused because in Outlook 2002 the size limit of an Outlook OST file is 1.82 GB. As the OST file has crossed the predefined size limit, it may be corrupt.

How an error can be solved?

The following methods will help you resolve this problem:

• Permanently delete all e-mail messages from any server based e-mail folders that are arranged to be in synchronization with the Outlook OST file.

• Transfer the data from any synchronized folder to a non-synchronized folder on the Exchange Server.
  
• Transfer and permanent deletion of data from a synchronized folder to an Outlook PST file.

However, if you are still facing problems, you need to take help of a third party OST to PST converter. These software are capable of efficiently converting all orphaned or corrupt OST files to equivalent PST files. They can safely restore various OST file components, such as emails, calendar items, contacts, etc.

Stellar Phoenix OST to PST Converter is a professional tool that effectively repairs damaged OST files and converts them to corresponding PST files. The dexterous Outlook OST Recovery software supports MS Outlook 2010, 2007, 2003, 2002, and 2000. Moreover, it is compatible with Windows 7, Vista, Server 2003, XP, and 2000.

Consequences of an orphaned OST file and reliable OST to PST Conversion tools

Sometimes, it happens that while using MS-Outlook you get stuck into a serious problem of damaged Outlook OST files. Corrupt or damaged Outlook files are an outcome of Exchange server crash, hardware failures, virus infection, oversized PST etc. In other cases, the OST file associated with a user mailbox may become orphaned as a result of user deletion, mailbox deletion, Exchange server maintenance, etc. In such situations, it becomes hard to retrieve your precious data from an orphaned or corrupt OST. However, if your OST file is corrupt, you can use the built-in ‘Scanost.exe’ tool to resolve this problem. But, due to its limitation, the tool might not be able to repair badly corrupt OST file. In such circumstances, you can go for Outlook OST Recovery using a reliable third-party utility.

For instance-Suppose, you have an Outlook OST file that has become unusable after the deletion of the user mailbox. You have some other account that permits you to login to the old user profile directly. Well, you face no problem while loading Outlook, but the embedded permissions on the file do not allow you to access emails and other items in the file and you receive the following error message on your screen:

“Attempting to view permissions in Outlook: Some permissions could not be displayed. Permission information for this folder could not be accessed.”

After receiving this error, you will lose access to all your vital emails, contacts, appointments, tasks, etc. The above error may also occur if the OST file is severely corrupt. In order to regain access to your lost data, you should opt for a third-party OST integrity check utility.

However, if the above resolution fails, it is advisable that you should take help of a third party OST to PST conversion tool. With the help of such tools, you can easily restore all your mailbox items, such as contacts, appointments, contacts, journal, tasks, events, calendar-entries, and more. These tools are specifically designed for the non-technical users and have a self-descriptive interface.

Stellar Phoenix OST to PST converter is a comprehensive tool that efficiently converts orphaned or corrupt OST files to PST files. The software retains formatting of all RTF and HTML messages. Moreover, it is compatible with compatible with Windows 7, Vista, Server 2003, XP, and 2000. 

Recover lost data by simply performing the OST to PST conversion

Presence of corruption in OST file may occur due to various reasons. Whatever may be the reason? Corruption of Outlook OST file is a serious concern which no one can ignore as it can pose major issues later on. The major problem that occurs after corruption of Outlook OST file is inaccessibility of OST data. OST file contains data of objects, such as contacts, e-mail messages, attachments, appointments, tasks, notes, journal, events, etc. Important e-mail operations cannot be carried out at the same time. These all are the difficulties that directly result after OST file corruption. Still, there is no need to be hopeless. Today, several third party tools are available in the market that are enough capable to perform OST to PST conversion. These tools have been specially designed to perform conversion of OST data into PST.

Below stated are some symptoms that are observed when synchronization of Outlook OST file cannot be carried out easily with Exchange Server:

• Appearance of several error messages at a time when Outlook OST file in Outlook is synchronized with your mailbox on a server that is executing MS-Exchange Server.
• Absence of some Outlook items, such as e-mail messages, appointment, contacts, tasks, journal, events, notes, posted items and documents from Outlook OST file or from the mailbox once a synchronization of OST file and mailbox is made.

Cause:

Reason behind the occurrence of above mentioned symptoms is a corruption of Outlook OST file. Some other issues related to synchronization of OST file is also the result of OST corruption.

Solution:

For solving the above stated problematic situation, you have to follow the below stated measures. These measures include:

• Use of Scanost.exe tool: Outlook versions like Outlook 2003 and 2007 make use of an OST Integrity Check tool to verify the inconsistencies contained in Outlook OST file. But, Outlook 2010 does not provide any tool to solve errors or inconsistencies in Outlook OST file as of earlier versions. However, if there is an issue with a specific folder, then it is suggested to resync the folder in MS- Outlook 2010. Below stated are the steps:

1. Select Properties by doing a right click on the folder.
2. Select Clear Offline items, and then select OK.
3. Select the Send/Receive tab on the Outlook 2010 ribbon.
4. Select Update Folder.

However, if the problem still remains the same, then it is good to opt for a third party OST PST converter tool. Yes, number of third party software are easily available online. The best thing is that a facility of a free demo version of the software is available on Internet. You just have to download a demo version of the software. Demo versions help you to evaluate the features of the product easily.

One such tool is Stellar Phoenix Mailbox Exchange Desktop that is specially designed to convert OST to PST. Once OST PST conversion takes place by this tool, data of Outlook OST file can be read into PST format of Microsoft Outlook. Developed with an interactive user interface, the tool is easy to operate. There is no need to have a sound technical knowledge for using this tool.