Hi, I have two Public Folders on a Exchange 2003. One stores Contacts, the other one stores Tasks. Now I want to get a Contact linked to a Task using WebDAV, so that the linked Contacts are underlined in the contacts-list of a Task and can be doubleclicked to open the Contact. After a lot of search (thanks to Siegfried Weber) I found that 3 properties have to be set: Contact link display names: http://schemas.microsoft.com/mapi/id/{00062008-0000-0000-C000-000000000046}/0x8586 Contact link entry ID's: http://schemas.microsoft.com/mapi/id/{00062008-0000-0000-C000-000000000046}/0x8585 Contact link search key's: http://schemas.microsoft.com/mapi/id/{00062008-0000-0000-C000-000000000046}/0x8584 I queried for the EntryID of a contact using the http://schemas.microsoft.com/mapi/proptag/0x0FFF0102 property and then tried to set the 0x8585 property of a task with this EntryID, with no success. The name correctly appears in the contacts-list, but it's not underlined and can't be doubleclicked. When I manually link the same contact to two different tasks and then query for the 0x8585 property of the tasks, they are both different, even if it's the same contact! Does anyone know how to build this properties correctly??? Thanks, Dan 1.) Retrieve Contacts-EntryID: <?xml version='1.0'?> <a:propfind xmlns:a='DAV:' xmlns:b='http://schemas.microsoft.com/mapi/proptag/'> <a:prop> <b:0x0FFF0102/> </a:prop> </a:propfind> Result: AAAAABpEc5CqZhHNm8gAqgAvxFoJAOmXFfkD3bVLnY7+B4nh6YIAAAAFRpUAAOmXFfkD3bVLnY7+B4nh6YIAAAAFS5YAAA== 2.) Update Task: <?xml version='1.0'?> <a:propertyupdate xmlns:a='DAV:' xmlns:b='urn:schemas-microsoft-com:datatypes' xmlns:c='xml:' xmlns:d='http://schemas.microsoft.com/mapi/id/{00062008-0000-0000-C000-000000000046}/' xmlns:m='http://schemas.microsoft.com/mapi/'> <a:set> <a:prop> <m:contacts><c:v>Test</c:v></m:contacts> <d:0x8584 b:dt='mv.bin.base64'> <c:v>AAAAABpEc5CqZhHNm8gAqgAvxFoJAOmXFfkD3bVLnY7+B4nh6YIAAAAFRpUAAOmXFfkD3bVLnY7+B4nh6YIAAAAFS5YAAA==</c:v> </d:0x8584> <d:0x8585 b:dt='mv.bin.base64'> <c:v>AAAAABpEc5CqZhHNm8gAqgAvxFoJAOmXFfkD3bVLnY7+B4nh6YIAAAAFRpUAAOmXFfkD3bVLnY7+B4nh6YIAAAAFS5YAAA==</c:v> </d:0x8585> <d:0x8586 b:dt='string'>Test</d:0x8586> </a:prop> </a:set> </a:propertyupdate>
