Complex sentence: The Church of Jesus Christ of Latter-day Saints (LDS Church) serves communion to its members only although without forbidding others to participate, but the Community of Christ (formerly the Reorganized Church of Jesus Christ of Latter Day Saints) practices open communion.
Split into simpler sentences: The Church of Jesus Christ of Latter-day Saints (LDS Church) practices closed communion, but does not take any measures to prevent others from participating. The Community of Christ (formerly the Reorganized Church of Jesus Christ of Latter Day Saints) practices open communion.