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When working with shared contacts, you might encounter the following issues.
Firewall issues
If your firewall blocks HTTP PUT messages, include an X-HTTP-Method-Override:
PUT header in a POST request. For more information, see
Google Data API protocol basics.
If your firewall blocks HTTP DELETE messages, include an
X-HTTP-Method-Override: DELETEheader in a POST request. For more
information, see
Google Data API protocol basics.
Limits
The following summarizes the constraints that apply to the Domain Shared Contacts API:
A single shared contact list can contain up to 200,000 entries.
A single shared contact can contain up to 2KB of data. The total
XML that represents the shared contact can be larger than 2KB.
A response is truncated if it exceeds 10MB in length.
One batch request can include up to 100 operations.
Changes can take up to 24 hours to be reflected in the email address
autocomplete and the contact manager.
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Missing the information I need","missingTheInformationINeed","thumb-down"],["Too complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-28 UTC."],[],[],null,["# Troubleshoot\n\nWhen working with shared contacts, you might encounter the following issues.\n\nFirewall issues\n---------------\n\nIf your firewall blocks HTTP `PUT` messages, include an `X-HTTP-Method-Override:\nPUT` header in a `POST` request. For more information, see\n[Google Data API protocol basics](https://developers.google.com/gdata/docs/2.0/basics).\n\nIf your firewall blocks HTTP `DELETE` messages, include an\n`X-HTTP-Method-Override: DELETE`header in a `POST` request. For more\ninformation, see\n[Google Data API protocol basics](https://developers.google.com/gdata/docs/2.0/basics).\n\nLimits\n------\n\nThe following summarizes the constraints that apply to the Domain Shared Contacts API:\n\n- A single shared contact list can contain up to 200,000 entries.\n- A single shared contact can contain up to 2KB of data. The total XML that represents the shared contact can be larger than 2KB.\n- A response is truncated if it exceeds 10MB in length.\n- One batch request can include up to 100 operations.\n- Changes can take up to 24 hours to be reflected in the email address autocomplete and the contact manager."]]
