You can try the best Converter tool SysVita OLM Converter (https://www.sysvita.com/olm-to-pst.php) to Convert OLM to PST. This application is the best answer for moving Mac Outlook to Windows Outlook PST in only a couple of moments without losing any information. Additionally, there is no document size impediment. The OLM to PST Converter programming permits the client to send out every one of the messages, messages, connections, contacts, diaries, and different subtleties to an Outlook PST document design. This product upholds all Windows OS and Mac OS variants. You can likewise download the free preliminary variant programming and can actually look at the elements and execution.
Visit:  https://sysvita.com/blog/how-to-convert-olm-to-pst-manually/
 

How to convert PST to MBOX?

OLM to PST Converter is a best tool which efficiently converter/repairs the all the items of Mac Outlook mailbox into PST 
format. Now users can easily migrate into MS Outlook environment. 

Download From here :-    http://www.olmtopstconverter.osttopstconverter-tool.com/

Please suggest me the official step to Backup Gmail to PC. So that I can secure my Gmail messages in case I loose access to my Gmail account.

First of all, there is no such official or freeware solution available to convert mbox file to olm format. So I would like to suggest you to try Advik MBOX to OLM Converter. Using this application you can easily convert mbox to olm format without any assistance. The tool support mbox file created by Thunderbird, Spicebird, The Bat, Opera Mail, Gmail, Apple Mail etc. 

1. Download and install Advik MBOX to OLM Converter
2. Launch tool and add .mbox file
3. Choose output target location 
4. Click convert

Done! Now you can import .olm file to Outlook for Mac without any error.
Download : http://www.adviksoft.com/dl/advik-mbox-to-olm.exe

Download Advik MBOX to Gmail Import in order to import MBOX to Gmail account securely. During the process of conversion, tool preserves meta properties, key elements as well as folder structure of emails. The tools have a very simple GUI which makes it easy to use for all.
Key Features of MBOX to Gmail Import.

• Supports batch conversion
• Compatible with all versions of Windows
• User-Friendly interface
• 100% Safe and Secure
• Supports multiple languages

How to Import MBOX to Gmail account.

1. Add MBOX files or folders
2. Enter Gmail login credential
3. Click on Convert

That's it. The tool will automatically import .mbox file to your Gmail account securely.

Download: http://www.adviksoft.com/dl/advik-mbox-to-gmail.exe

Advik PST to Gmail Import is quite comprehensive application which allows you to import your Microsoft Outlook Emails to Gmail without any file size limitation. This software can be workable on all version of Windows such as Windows 10, 8.1, 8, 7, XP etc. Import PST to Gmail without losing any of your email attachment files. The best part of this software is that it will maintain the folder structure as well as the meta data such as CC, BCC, Attachments, Sender and Reciever Details etc.
Key Feature
Maintains folder hierarchy
Bulk Transfer
Support Multiple Languages
Retains Meta Data Properties
Free Fully Functional tool
Read More : https://gallery.technet.microsoft.com/office/outlook-emails-to-gmail-ddeb2902

If you want to again access OST files without using Exchange Server, So I suggest OST files users then Download PDS Exchange OST Recovery software which solve Exchange OST file any problems to recover inaccessible files of Exchange OST to access OST files without using Exchange Server in only correct path. Along with it provides many facilities. PDS OST Recovery  tool  instantly save files-folders database from Offline OST file data to a PST file, EML, MSG, HTML, MHTML, TXT, RTF, DOC, PDF, MBOX and Outlook Profile. Without losing internal items you can split recovered large PST file into small PST file (1GB to 5GB) By helping master solution of PDS OST recovery tool that is able to filter messages “First Date to Last Date” to repair emails. It is right way to naming convention feature-according to users “Date to Date” with in least time.

More Details-:  http://www.perfectdatasolutions.com/convert-ost-to-pst.html



 

If you are facing any problem with Mac Outlook OLM file Accessing, then use Outlook stores user information in form of PST files and mac Outlook stores user information in form of OLM file format.Sometime it becomes tough to migrate from mac Outlook to windows Outlook without using professional OLM to PST Converter software which can easily convert OLM file to PST format with all email components, such as Inbox, Contacts, Calendars, Tasks, and Notes etc from the Outlook for Mac (OLM) data file to the corresponding MS Outlook Personal Storage (PST) File. To download visit: http://www.filesrecoverytools.com/olm-to-pst-converter.html

 

I have a user who's contacts to include all the members of two campaigns as part of his Outlook Synchronization. The sync was then manually forced so that he could have the contacts pushed through to his Outlook. However the contacts that appeared in his iPhone were duplicated after the manual sync. I will appreciate a suggestion on this. He has mentioned these items:


1.      His icloud needs to be turned off from circulating contact information to his iPhone

2.      Between his phone contacts and Outlook contacts,  is there a glitch in the settings that is duplicating them

Ex: in Salesforce, John has one entry owned by Ken. In Outlook, John appears three times. In Ken's contacts on his iPhone, John appears 7 times.

Can the duplicates be removed safely from his iPhone contacts?

Thank you,