If you require solution for merging different contact groups in Outlook then get our file management system, because this file management system easily works on Outlook and merge different contact groups together. If you are using Outlook from long time so definitely there is some difficulty, due to heavy data, number of contact folders or other reason. In such situation use only PST Merge files management system. If you merge contact groups with our file management system so after merging different contact groups into one group, manage all contacts in a way. If you need to synchronize contact group after merging contacts in Outlook. Then also you can use this file management system. Use it on third party tool and merge external Outlook data files. Get practical knowledge with the trial version freely. The trial version merge first three folders in Outlook. After trial version, you can purchase full process version of the software, get personal key of the software on $69 and business key on $199. Contact support team 24x7 hours for assistance or further enquiry.